七年级期末复习每日一练2

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期末复习每日一练人教版七年级英语下册

期末复习每日一练人教版七年级英语下册

七年级英语期末必考语法每日一练(第一天)日期: ___________________ 姓名: ___________________1. Stop ________________(talk), please. Miss Li is ing.2. Mozart was a famous ______________ (music) in the world.3. Kitty is tall and pretty. She loves ______________ (dance).4. It's Lily's birthday. I want ____________ (make) a card for her.5. Can your little brother ______________(swim) in the river? Yes, he can.6. He is very scared of __________ (swim) alone. He always asks his friends to go with him.7. Li Ming is hardworking. He practices _______________ (play) the violin every day.七年级英语期末必考语法每日一练(第一天)日期: ___________________ 姓名: ___________________1. Stop ________________(talk), please. Miss Li is ing.2. Mozart was a famous ______________ (music) in the world.3. Kitty is tall and pretty. She loves ______________ (dance).4. It's Lily's birthday. I want ____________ (make) a card for her.5. Can your little brother ______________(swim) in the river? Yes, he can.6. He is very scared of __________ (swim) alone. He always asks his friends to go with him.7. Li Ming is hardworking. He practices _______________ (play) the violin every day.七年级英语期末必考语法每日一练(第二天)日期: ___________________ 姓名: ___________________1. Linda is good at_________(tell) stories.2. It's not easy for us_________(make) friends in new place.3. He____ (need)__________(work) at the weekend.4. The teacher tells me__________ (clean) the house.5. ________ she ____(take) a walk in the park every morning?6. My friends always ____________ (walk) to the park after dinner and my dog loves going ________ (walk) with us.7. My friends enjoy _________ (run) in the morning.七年级英语期末必考语法每日一练(第二天)日期: ___________________ 姓名: ___________________1. Linda is good at_________(tell) stories.2. It's not easy for us_________(make) friends in new place.3. He____ (need)__________(work) at the weekend.4. The teacher tells me__________ (clean) the house.5. ________ she ____(take) a walk in the park every morning?6. My friends always ____________ (walk) to the park after dinner and my dog loves going ________ (walk) with us.7. My friends enjoy _________ (run) in the morning.1. He sometimes _____________ (get) up after o'clock.2. Andy often helps his teacher_________(clean)the blackboard.3. Who__________(clean) the blackboard on Thursday?4. My parents enjoy ___________(walk) to school every morning.5. ________ your sister Millie________(go) to school by_________(bike)?6. I think the old man is_________(eight) years old.7. We are going to_________ (leave) for the beach by Motorbike tomorrow.七年级英语期末必考语法每日一练(第三天)日期: ___________________ 姓名: ___________________1. He sometimes _____________ (get) up after o'clock.2. Andy often helps his teacher_________(clean)the blackboard.3. Who__________(clean) the blackboard on Thursday?4. My parents enjoy ___________(walk) to school every morning.5. ________ your sister Millie________(go) to school by_________(bike)?6. I think the old man is_________(eight) years old.7. We are going to_________ (leave) for the beach by Motorbike tomorrow.1. Mrs.White _________ (live) in the small room since she came here.2. The Smiths_________(leave) for Sichuan next week.3. There are three_____(hundred)and sixtyfive books.4. This fish is__________(live).5. Millie, my friend,_________(not be) late for school.6. Don't be so_________(noise)! Jim is sleeping now.7. Tom,_____(be) late for school next time.8. There are two___(read) rooms in the library.七年级英语期末必考语法每日一练(第四天)日期: ___________________ 姓名: ___________________1. Mrs.White _________ (live) in the small room since she came here.2. The Smiths _________ (leave) for Sichuan next week.3. There are three __________ (hundred)and sixtyfive books.4. This fish is __________ (live).5. Millie, my friend, _________ (not be) late for school.6. Don't be so_________ (noise)! Jim is sleeping now.7. Tom, ___________ (be) late for school next time.8. There are two_________ (read) rooms in the library.1. The pretty girl with long hair _____________ (not wear) glasses.2. Let me _____________(have) a look at your new book.3. Lucy, please_____________ (read) the new words in your book.4. Some young people go to________ (sleep) late and feels____________ (sleep) next day.5. Granny often tells us _____________ (save) water in our daily life.6. The table is_____________ (make) of wood.7. The young man was brave enough ____________(save) a girl from a river.8. I like cats because they are _____________(friend).七年级英语期末必考语法每日一练(第五天)日期: ___________________ 姓名: ___________________1. The pretty girl with long hair _____________ (not wear) glasses.2. Let me _____________(have) a look at your new book.3. Lucy, please_____________ (read) the new words in your book.4. Some young people go to________ (sleep) late and feels____________ (sleep) next day.5. Granny often tells us _____________ (save) water in our daily life.6. The table is_____________ (make) of wood.7. The young man was brave enough ____________ (save) a girl from a river.8. I like cats because they are _____________ (friend).1. The teacher notices him _____________ (sleep) in class. It makes her angry.2. Our earth is in__________because people have polluted it.(dangerous)3. The Li River in Guilin is one of the most _____________ places in the world.(beauty)4. Why not_________(save) water, Henry?5. Bruce es from __________.(Australian)6. My mother is busy. She often__________(wash) clothes in the evening.7. What about _____________ (use) pens to write?8. Would you like _____________ (drink) a glass of orange juice?七年级英语期末必考语法每日一练(第六天)日期: ___________________ 姓名: ___________________1. The teacher notices him _____________ (sleep) in class. It makes her angry.2. Our earth is in__________because people have polluted it.(dangerous)3. The Li River in Guilin is one of the most _____________ places in the world.(beauty)4. Why not_________(save) water, Henry?5. Bruce es from __________. (Australian)6. My mother is busy. She often__________ (wash) clothes in the evening.7. What about _____________ (use) pens to write?8. Would you like _____________ (drink) a glass of orange juice?七年级英语期末必考语法每日一练(第七天)日期: ___________________ 姓名: ___________________1. Tina is my good friend, and she is always ready to help __________. (other)2. I will give you three __________.(wish)3. She has a chance __________ (study) in America.4. My mother wants me __________ (drink) milk every day.5. Jenny is watching TV in the __________(live) room.6. If you don't hurry up, you__________(miss) the last bus back to the city.7. Do you have an umbrella? It's __________(rain).8. The card says “No __________ (park)". It means you can't __________ (park) here.七年级英语期末必考语法每日一练(第七天)日期: ___________________ 姓名: ___________________1. Tina is my good friend, and she is always ready to help __________. (other)2. I will give you three __________.(wish)3. She has a chance __________ (study) in America.4. My mother wants me __________ (drink) milk every day.5. Jenny is watching TV in the __________(live) room.6. If you don't hurry up, you__________(miss) the last bus back to the city.7. Do you have an umbrella? It's __________(rain).8. The card says “No __________ (park)". It means you can't __________ (park) here.1. The cute boy in yellow sits between __________ (he) and __________ (I).2. It's __________ (sun) today. Let's go out, Peter!3. It sometimes __________(snow) in Jiangyan. It will be__________ (snow) tomorrow.4. The boy sits between_____(she) and_________(he)5. What is the weather like today? It is_________(rain).6. What's the weather like in spring? It is warm and __________ (wind) in spring.七年级英语期末必考语法每日一练(第八天)日期: ___________________ 姓名: ___________________1. The cute boy in yellow sits between __________ (he) and __________ (I).2. It's __________ (sun) today. Let's go out, Peter!3. It sometimes __________(snow) in Jiangyan. It will be__________ (snow) tomorrow.4. The boy sits between_____(she) and_________(he)5. What is the weather like today? It is_________(rain).6. What's the weather like in spring? It is warm and __________ (wind) in spring.1. Those English exercises are __________(easy) for little children so they can finish them __________ (easy).2. Next week, we __________(climb) a mountain.3. My father can do it __________(easy)4. Let's go __________(cross) the bridge and help the crying boy.5. You can take the __________(turn) on your right.6. The question is so difficult that many students can't work it out __________ (easy).七年级英语期末必考语法每日一练(第九天)日期: ___________________ 姓名: ___________________1. Those English exercises are __________(easy) for little children so they can finish them __________ (easy).2. Next week, we __________(climb) a mountain.3. My father can do it __________(easy)4. Let's go __________(cross) the bridge and help the crying boy.5. You can take the __________(turn) on your right.6. The question is so difficult that many students can't work it out __________ (easy).1. The twins __________ (not be) good at playing football or basketball2. My family __________ (be) not big, but my family __________(be) happy together.3. Why not __________ (go) shopping with us?4. __________ your father (watch) TV every evening?5. No. He usually __________ (watch) TV at weekend.6. __________ (be) this pair of shorts yours? No, they are not mine.7. Now the class __________ (be) having an English lesson8. The man with big eyes __________ a teacher (be).七年级英语期末必考语法每日一练(第十天)日期: ___________________ 姓名: ___________________1. The twins __________ (not be) good at playing football or basketball2. My family __________ (be) not big, but my family __________(be) happy together.3. Why not __________ (go) shopping with us?4. __________ your father (watch) TV every evening?5. No. He usually __________ (watch) TV at weekend.6. __________ (be) this pair of shorts yours? No, they are not mine.7. Now the class __________ (be) having an English lesson8. The man with big eyes __________ a teacher (be)七年级英语期末必考语法每日一练(第十以天)日期: ___________________ 姓名: ___________________1. Hi, Nick. Here __________ (be) your new trousers.2. __________ (who) book is it? It's __________ (I)3. Excuse me, __________ your name Jill? Yes, it __________ .(be)4. __________ you from England? Yes, I __________ English.(be)5. Could you give me some __________ about how to be a good student? (suggest)6. There are two famous __________ in our town. (church)7. How many __________ (orange) are there in the fridge?8. We are __________ (luck) enough to get the tickets for the opera show.七年级英语期末必考语法每日一练(第十一天)日期: ___________________ 姓名: ___________________1. Hi, Nick. Here __________ (be) your new trousers.2. __________ (who) book is it? It's __________ (I)3. Excuse me, __________ your name Jill? Yes, it __________ .(be)4. __________ you from England? Yes, I __________ English.(be)5. Could you give me some __________ about how to be a good student? (suggest)6. There are two famous __________ in our town. (church)7. How many __________ (orange) are there in the fridge?8. We are __________ (luck) enough to get the tickets for the opera show.七年级英语期末必考语法每日一练(第十二天)日期: ___________________ 姓名: ___________________1. Some __________ (woman) cooks are good at making cakes2. I went to Beijing, Nanjing and other __________ (city).3. They are my __________ (parent) puters.4. What does your grandpa do? He is a __________ (farm)5. Thanks for __________ (give) us so much help.6. Jenny is so __________ (excite) at the __________ (excite) film.7. He looked for his pen, but he couldn't find it __________ (somewhere)8. I __________ (travel) to Asia ten years ago.七年级英语期末必考语法每日一练(第十二天)日期: ___________________ 姓名: ___________________1. Some __________ (woman) cooks are good at making cakes2. I went to Beijing, Nanjing and other __________ (city).3. They are my __________ (parent) puters.4. What does your grandpa do? He is a __________ (farm)5. Thanks for __________ (give) us so much help.6. Jenny is so __________ (excite) at the __________ (excite) film.7. He looked for his pen, but he couldn't find it __________ (somewhere)8. I __________ (travel) to Asia ten years ago.。

七年级上册数学每日一练1至32

七年级上册数学每日一练1至32

每日一练(一)1.在国内疫情持续好转、旅游产业复工复产的当下,迎来了2020中秋国庆黄金周.据统计,本次黄金周全国出游人数约为637000000人次.把数据637000000用科学记数法表示为()A.6.37×107B.6.37×108C.0.637×109D.63.7×1062.下列等式的变形中,正确的是()A.如果,那么a=bB.如果|a|=|b|,那么a=bC.如果ax=ay,那么x=yD.如果m=n,那么3、计算4、解方程5、先化简,再求值:3(x2y﹣3x)﹣4(x﹣2x2y)+20x,其中x=1,y=﹣2.每日一练(二)1.等式就像平衡的天平,能与如图的事实具有相同性质的是()A.如果a=b,那么ac=bc B.如果a=b,那么=(c≠0)C.如果a=b,那么a+c=b+c D.如果a=b,那么a2=b22、如果多项式2a2﹣6ab与﹣a2﹣2mab+b2的差不含ab项,则m的值为3、若x3y a与﹣2x b y2的和仍为单项式,则a﹣b的值为.4、计算5、已知m,n是有理数,单项式﹣x n y的次数为3,而且方程(m+1)x2+mx﹣tx+n+2=0是关于x的一元一次方程.(1)若该方程的解是x=3,求t的值.(2)若题目中关于x的一元一次方程的解是整数,请求出整数t的值.每日一练(三)1.用四舍五入法,把46021精确到百位是.2.在两个形状、大小完全相同的大长方形内,分别互不重叠地放入四个如图③的小长方形后得图①和图②,已知大长方形的长为a,两个大长方形未被覆盖部分,分别用阴影表示,则图①阴影部分周长与图②阴影部分周长的差是.(用含a的代数式表示)3、解方程3x﹣(5x﹣2)=2(x﹣1)4、18×(﹣)﹣8÷(﹣2);5、设A=x3﹣2x2+4x+3,B=x2+2x﹣6,C=x3+2x﹣3.当x=﹣2时,求A﹣(B+C)的值.每日一练(四)1.3.14159精确到千分位是.2.小华在计算多项式P加上x2﹣3x+6时,因误认为加上x2+3x+6,得到的答案是2x2﹣4x,则P应是.=.3、计算4.已知c<0<a,ab<0,|c|>|a|>|b|,化简:|b|﹣|a+b|﹣|c﹣a|+|b﹣c|.5.先化简,再求值,其中x=1,.6.计算:(1);(2)4(2x2﹣y2)﹣3(3y2﹣2x2).每日一练(五)1.下列各等式的变形中,一定正确的是()A.若=0,则a=2B.若a=b,则2(a﹣1)=2(b﹣1)C.若﹣2a=﹣3,则a=D.若a=b,则=2.如图,数轴上点A在原点O的左侧,点B在原点的右侧,AO=5,BO=7.(1)请写出点A表示的数为,点B表示的数为,A、B两点的距离为;(2)若一动点P从点A出发,以3个单位长度/秒的速度向右运动;同一时刻,另一动点Q从点B出发,以1个单位长度/秒的速度向右运动.①点P刚好在点C追上点Q,请你求出点C对应的数;②经过多长时间PQ=5?每日一练(六)1.把四张形状大小完全相同的小长方形卡片(如图①),卡片长为x,宽为y,不重叠地放在一个底面为长方形(宽为a)的盒子底部(如图②),盒底面未被卡片覆盖的部分用阴影表示.则图②中两块阴影部分周长和是(用只含b的代数式表示).2.已知一个长方形的宽是m+2n,长比宽多m,则该长方形的周长是.3.若有理数a、b、c在数轴上的位置如图所示,则化简:|a|+|a﹣b|﹣|c+b|=.4.如图是2021年3月的月历,回答下列问题.(1)带阴影的十字框中的5个数的和与十字框中间的数有什么关系?(2)若将式子框上下左右移动,但一定要框住月历中的5个数,设中间的数为a.①用含a的式子表示b,c,d,e;②求式子框中五个数的和,结果用含a的式子表示.每日一练(七)1.下列等式变形正确的是()A.由a=b,得5+a=5﹣bB.如果3a=6b﹣1,那么a=2b﹣1C.由x=y,得D.如果2x=3y,那么2.先化简,再求值:﹣(xy﹣x2)+3(y2﹣x2)+2(xy﹣y2),其中x=2,y=.3.解方程:(1)2(2x+1)=1﹣5(x﹣2);(2).4.我们把形如(n是正整数,n≥2)的分数叫做单位分数,如、、…(1)任何一个单位分数都可以拆成两个不同的单位分数之和,如、、…,观察上述式子的规律,回答下面的问题:①把写成两个单位分数之和:=;②把(n是正整数,n≥2)写成两个单位分数之和:=;③计算当时,最后一项x=;(2)某些单位分数也可以拆成两个分母是相邻自然数的单位分数的差,如,,,则在单位分数、、、…、中,能按上述要求拆分的有个.每日一练(八)1.如图是由三个三角形组成的一个面积为(6a2+4a)cm2的长方形,三个三角形的面积分别是S1,S2,S3,若S1=(3a2+2a)cm2,S3=(2a2﹣a)cm2,则S2等于.2.已知a,b为定值,关于x的方程=1﹣,无论k为何值,它的解总是1,则a+b=.3.小明在解方程=﹣1,方程两边都乘以各分母的最小公倍数去分母时,漏乘了不含分母的项﹣1,得到方程的解是x=3,请你帮助小明求出m的值和原方程正确的解.4.如图,已知数轴上点A表示的数为8,B是数轴上一点,且AB=15.动点P从点A出发,以每秒6个单位长度的速度沿数轴向左匀速运动,设运动时间为t(t>0)秒.(1)写出数轴上点B表示的数,点P表示的数(用含t的代数式表示);(2)动点Q从点B出发,以每秒3个单位长度的速度沿数轴向左匀速运动,若点P、Q 同时出发,问点P运动多少秒时追上点Q?(3)若点D是数轴上一点,点D表示的数是x,请你探索式子|x+5|+|x﹣7|是否有最小值?如果有,写出求最小值的过程;如果没有,说明理由.每日一练(九)1.世界卫生组织2020年10月31日公布的最新数据显示,全球累计新冠肺炎确诊病例达45400000例,其中45400000用科学记数法表示为()A.4.54×107B.454×107C.4.54×108D.454×108 2.按要求对下列各数取近似值:31.92≈(精确到个位);0.2036≈(精确到百分位).3.计算:﹣12+[﹣4+(1﹣0.2×)]÷(﹣2)2.4.解方程.5.已知A=2x2+3xy﹣2x﹣1,B=﹣x2+.(1)当x=﹣1,y=﹣2时,求4A﹣(3A﹣2B)的值;(2)若(1)中式子的值与x的取值无关,求y的值.每日一练(十)1.定义一种新运算“a☆b”的含义为:当a≥b时,a☆b=a+b;当a<b时,a ☆b=a﹣b.例如:3☆(﹣4)=3+(﹣4)=﹣1,(﹣6)☆=(﹣6)﹣=﹣6,则方程(3x﹣7)☆(3﹣2x)=2的值为()A.1 B.C.6或D.62.对有理数a,b规定运算“*”的意义为a*b=a+2b,比如:5*7=5+2×7,则方程3x*=2﹣x的解为.3.计算:(1).(2)﹣24+×[6+(﹣4)2]+|﹣1|÷×8.;4.先化简再求值:4x2y﹣2[7xy﹣2(4xy﹣2)﹣2x2y]+8,其中x=﹣,y=2.5.某船从甲码头顺流而下到达乙码头,然后再从乙码头逆流而上返回甲码头共用10小时,此船在静水中速度为25千米/时,水流速度为5千米/时.(1)此船顺流而行的速度为千米/时,逆流而行的速度为千米/时;(2)求甲乙两码头间的航程.每日一练(十一)1.如图,三个天平的托盘中形状相同的物体质量相等,图①②所示的两个天平处于平衡状态,要使第3个天平也保持平衡,则需在它的右盘中放置()个球.A.5 B.6 C.7 D.82.已知ab≠0,则+的值可能是.3.解方程:(1)5(m+8)﹣6(2m﹣7)=﹣m+22;(2).4.(1)化简求值:求x﹣2(x﹣y2)+(﹣x+y2)的值,其中x=﹣2,y =;(2)已知:x+y=2,xy=﹣3,求(x+xy)﹣[(xy﹣2y)﹣x]﹣xy的值.每日一练(十二)1.小明学习了等式的性质后,做了下面结论很荒谬的推理:如果a=b,那么2a=2b,3a=3b.①则2a+3b=3a+2b.②则2a﹣2b=3a﹣3b.③则2(a﹣b)=3(a﹣b)④则2=3.⑤以上推理错误的步骤的序号为()A.⑤B.③C.③,⑤D.②,③2. 已知|a|=|﹣3|,则a等于.3.数2305600精确到万位的近似数是.4.计算(1)(﹣)÷(﹣)+(﹣2)×6;(2)()×(﹣36);5.如图,数轴上的三点A、B、C分别表示有理数a、b、c.(1)填空:a﹣b0,a+c0,b﹣c0;(用<或>或=号填空)(2)化简:|a﹣b|﹣|a+c|+|b﹣c|.每日一练(十三)1.若单项式a m b3与﹣2a2b n的和仍是单项式,则方程x﹣n=1的解为()A.x=﹣2 B.x=2 C.x=﹣6 D.x=62.已知方程与关于x的方程3n﹣1=3(x+n)﹣2n的解互为相反数,则n的值为.3.若a m+2b3与(n+2)a4b3是同类项,且它们的和为0,则n m=.4.计算(1).(2).5.力“皖”狂澜,新冠肺炎期间,安徽共出动八批,共计1362位医护人员驰援武汉,他们是新时代最可爱的人.3月19日,第二批和第八批医护人员共130人乘坐飞机返回合肥,其中第二批人数是第八批人数的3倍还多10人,第八批安徽共出动了多少名医护人员?每日一练(十四)1.下列说法不正确的有()①绝对值是本身的数是正数;②符号不同的两个数互为相反数;③两数相加,和一定大于任何一个加数;④线段AB和线段BA表示的是同一条线段.A.①③B.②③C.①②③D.①②④2.按如图所示的运算程序,能使输出的m的值为1的是()A.x=1,y=1 B.x=2,y=﹣1 C.x=﹣2,y=﹣3 D.x=﹣1,y=3 3.已知x=1是方程3x﹣m=x+2n的一个解,则整式m+2n+2020的值为.4.随着新冠肺炎疫情逐渐得到控制,全国各地各类学校逐渐实行复学,我校为了保证师生能够顺利的复学以及返校后师生的身体健康,早在3月份学校两次同时购进了医用口罩,消毒液两种防疫医用产品,第一次购进医用口罩的包数比消毒液的瓶数多20%,第二次购进医用口罩的包数比第一次购进的医用口罩的数量少50%,结果第二次购两种医用产品的总数量比第一次购买两种医用产品的总数量多25%,第二次购买的医用口罩,消毒液两种医用产品的总费用比第一次购买的医用口罩,消毒液两种医用产品的总费用少30%(假设医用口罩,消毒液两种医用产品的单价不变),则消毒液与医用口罩的单价的比值是.5.解方程:(1);(2).每日一练(十五)1.如图,一张长方形硬纸片的长为12厘米,宽为10厘米,将它的四角各剪下一个边长为x厘米的正方形(阴影部分),然后沿虚线将Ⅰ、Ⅱ、Ⅲ、Ⅳ这四个部分折起,构成一个无盖的长方体纸盒,这个纸盒的体积是()A.(12﹣x)(10﹣x)B.x(12﹣x)(10﹣x)C.(12﹣2x)(10﹣2x)D.x(12﹣2x)(10﹣2x)2.数轴上点A表示的数为5,则距离A点3个单位长度的点表示的数为.3.若(a﹣2)x|a|﹣1﹣7=0是一个关于x的一元一次方程,则a=.4.已知数轴上两点A、B对应的数分别为﹣1、3,点P为数轴上一动点,其对应的数为x.(1)若点P到点A、点B的距离相等,则点P对应的数为.(2)利用数轴探究:找出满足|x﹣3|+|x+1|=8的x的所有值是.(3)当点P以每秒6个单位长的速度从O点向右运动时,点A以每秒6个单位长的速度向右运动,点B以每秒钟5个单位长的速度向右运动,问它们同时出发,几秒后P点到点A、点B的距离相等?每日一练(十六)1.如果a、b互为相反数,c、d互为倒数,m的倒数是它本身,则的值为()A.2 B.2或0 C.3或2 D.不确定2.若|5﹣x|=x﹣5,则x的取值范围是.3.当x=﹣3时,多项式ax3+bx+1的值为﹣4;则当x=3时,ax3+bx+4的值为.4.阅读材料:我们知道,4x﹣2x+x=(4﹣2+1)x=3x,类似地,我们把(a+b)看成一个整体,则4(a+b)﹣2(a+b)+(a+b)=(4﹣2+1)(a+b)=3(a+b).“整体思想”是中学教学解题中的一种重要的思想方法,它在多项式的化简与求值中应用极为广泛,尝试应用:(1)把(a﹣b)2看成一个整体,求出3(a﹣b)2+6(a﹣b)2﹣2(a﹣b)2的结果.(2)已知x2﹣2y=4,求3x2﹣6y﹣21的值.5.对于任意数a,b,c,d,定义.(1)求的值;(2)若,,求a2+b2的值.每日一练(十七)1.已知a,b,c在数轴上的位置如图所示,化简|a+c|﹣|a﹣2b|﹣|c+2b|的结果是()A.4b+2c B.0C.2c D.2a+2c2.如果代数式x2+2x的值为5,那么代数式2x2+4x﹣3的值等于()A.2B.5C.7D.133.下列结论:①几个有理数相乘,若其中负因数有奇数个,则积为负;②若a|c|=b|c|,则a=b;③若|a|>|b|,则(a+b)(a﹣b)是正数;④已知0<m<1,﹣1<n<0,那么在代数式|m+n|、|m﹣n|、|m+|、|m﹣|,对于任意有理数m、n,代数式的值最大的是|m+|,其中一定正确的有()A.0个B.1个C.2个D.3个4.计算:﹣23÷×()2+(﹣1)45.解方程6.先化简,再求值:,其中x=﹣2,y=1.每日一练(十八)1.下列结论正确的是()A.单项式的系数是,次数是4B.多项式2x2+xy2+3是二次三项式C.单项式m的次数是1,没有系数D.单项式﹣xy2z的系数是﹣1,次数是42.在同一平面内,已知∠AOB=50°,∠COB=30°,则∠AOC等于()A.80°B.20°C.80°或20°D.10°3.某班组每天需生产50个零件才能在规定的时间内完成一批零件任务,实际上该班组每天比计划多生产了6个零件,结果比规定的时间提前3天并超额生产120个零件,若设该班组要完成的零件任务为x个,则可列方程为()A.B.C.D.4.已知关于x、y的代数式(2x2+ax﹣y+6)﹣(2bx2﹣3x+5y﹣1)的值与字母x的取值无关.(1)求a和b值.(2)设A=a2﹣2ab﹣b2,B=3a2﹣ab﹣b2,求3[2A﹣(A﹣B)]﹣4B的值.每日一练(十九)1.“一方有难,八方支援”,在2020年新冠疫情期间,全国共有346支医疗队,约42600人支援湖北,其中42600用科学记数法表示为()A.4.26×103B.42.6×103C.4.26×104D.0.426×1052.下列变形中错误的是()A.由x=y,得x+5=y+5B.由m=n,得m﹣2=n﹣2C.由a=b,得﹣3b=﹣3a D.由mx=my,得x=y3.三江夜游项目是宁波市月光经济和“三江六岸”景观提升的重要工程,一艘游轮从周宿夜江游船码头到宁波大剧院游船码头顺流而行用40分钟,从宁波大剧院游船码头沿原线返回周宿夜江游船码头用了1小时,已知游轮在静水中的平均速度为8千米/小时,求水流的速度.设水流的速度为x千米/小时,则可列方程为()A.40(8﹣x)=4×(8+x)B.(8+x)=8C.(8+x)=8﹣x D.4.若关于x的方程(m﹣4)x|m|﹣3﹣2=0是一元一次方程,则m=.5.(1)计算:﹣32﹣[﹣()2+(1﹣0.2×)÷(﹣2)];(2)解方程:++=.每日一练(二十)1.某商人一次卖出两件衣服,一件赚了15%,另一件赔了15%,卖价都是1955元,在这次生意中商品经营( ) A .不赚不赔B .赚90元C .赚100元D .赔90元2.让我们轻松一下,做一个数字游戏:第一步:取一个自然数n 1=5,计算n 12+1,将所得结果记为a 1; 第二步:算出a 1的各位数字之和得n 2,计算n 22+1,结果为a 2; 第三步:算出a 2的各位数字之和得n 3,再计算n 32+1,结果为a 3; …依此类推,则a 2008= .3.已知关于y 的方程3y +2m ﹣5=0的解比y ﹣3(m ﹣2)=2的解大1,则m 的值为( ) A .B .C .D .4.如图,已知a 、b 、c 在数轴上的位置,求|b +c |﹣|a ﹣b |﹣|c ﹣b |的值.5.解方程:﹣=1;6.计算:94)211(42415.0322⨯-----+-每日一练(二十一)1.已知一个多项式与﹣x +3x 2的和是3x +x 2,那么这个多项式是 .2.如图,在正方体的展开图中,与汉字“抗”相对的面上的汉字是( )A .共B .同C .疫D .情3. 若关于x 的方程9x ﹣14=ax +3的解为整数,那么满足条件的所有整数a 的和为 .4. 计算:322012111()()(1)(2)(1)2216⎡⎤--÷--⨯-÷-⎢⎥⎣⎦5.小明在解方程=﹣1,方程两边都乘以各分母的最小公倍数去分母时,漏乘了不含分母的项﹣1,得到方程的解是x =3,请你帮助小明求出m 的值和原方程正确的解.每日一练(二十二)1.将边长为a的正方形纸片中间挖去一个正方形的洞,成为一个边宽为b的方框.把5个这样的方框按图示平放在桌面上,则桌面被这些方框盖住部分的面积是()A.20ab﹣20b2B.20ab﹣28b2C.10ab﹣13b2D.10ab﹣18b22.如图所示,甲、乙两动点分别从正方形ABCD的顶点A,C同时沿正方形的边开始移动,甲点依顺时针方向环行,乙点依逆时针方向环行,若乙的速度是甲的速度的4倍,则它们第2020次相遇在边()上A.AB B.BC C.CD D.DA3永辉超市推出如下优惠方案:(1)一次性购物不超过100元,不享受优惠;(2)一次性购物超过100元,但不超过300元一律9折;(3)一次性购物超过300元一律8折.王波两次购物分别付款80元、252元,如果他将这两次所购商品一次性购买,则应付款()A.288元B.332元C.288元或316元D.332元或363元4..m为________时,关于x的方程4x﹣2m=3x﹣1的解是x=2x﹣3m的解的2倍.5.若A=2x2+xy+3y2,B=x2﹣xy+2y2.(1)若(1+x)2与|2x﹣y+2|为相反数,求2A﹣3(2B﹣A)的值;(2)若x2+y2=4,xy=﹣2,求A﹣B的值.每日一练(二十三)1在一张日历上,在同一行或同一列上任意圈出三个相邻的数,它们的和不可能是()A.63B.39C.57D.502.如图,点O为原点,A、B为数轴上两点,AB=15,且OA:OB=2:1(1)A、B对应的数分别为、;(2)点A、B分别以4个单位/秒和3个单位/秒的速度相向而行,则几秒后A、B相距1个单位长度?(3)动点P从点A出发,沿数轴正方向运动,M为线段AP的中点,N为线段PB的中点.在点P运动的过程中,线段MN的长度是否发生变化?若变化,请说明理由;若不变,请你画出图形,并求出线段MN的长.每日一练(二十四)1.疫情无情人有情,爱心捐款传真情.某校三个年级为疫情重灾区捐款,经统计,七年级捐款数占全校三个年级捐款总数的,八年级捐款数是全校三个年级捐款数的平均数,已知九年级捐款1964元,求其他两个年级的捐款数.若设七年级捐款数为x元,则可列方程为()A.x+x+1964=x B.x+x+1964=xC.x+x+1964=x D.x+x+1964=3x2.2020年第二季度中国GDP为35746.61亿美元,比去年同期减少285.51亿美元.而美国预计二季度GDP下降37%,GDP为35370.97亿美元,比去年同期减少18221.41亿美元.数量显示,中国第二季度GDP比美国多375.64亿美元,跃居世界第一,创造新的历史记录.2020年第二季度中国的GDP用科学记数法表示为()A.3.574661×104亿美元B.3.574661×106亿美元C.3.537097×104亿美元D.1.822141×104亿美元3.(1)如图1,已知点C在线段AB上,线段AC=10厘米,BC=6厘米,点M,N分别是AC,BC的中点,求线段MN的长度;(2)在(1)的条件下,动点P、Q分别从A、B同时出发,点P以2cm/s的速度沿AB 向右运动,终点为B,点Q以1cm/s的速度沿AB向左运动,终点为A,当一个点到达终点,另一个点也随之停止运动,求运动多少秒时,C、P、Q三点有一点恰好是以另两点为端点的线段的中点?每日一练(二十五)1.下列说法正确的是()A.0既不是正数也不是负数,也不是自然数B.任意有限小数可以化为分数,但无限循环小数不能化为分数C.圆周率π是无限不循环小数,故不是有理数D.0表示没有,它是正数和负数的分界点2.下列关于单项式﹣的说法中,正确的是()A.系数是1,次数是2B.系数是﹣,次数是2 C.系数是,次数是3D.系数是﹣,次数是3 3.计算:(﹣2)÷(﹣2÷)﹣|﹣3|×(﹣1)+(﹣0.5)4..5.计算:(1)27°26′+53°48′(2)90°﹣79°18′6″.每日一练(二十六)1.整式﹣0.3x2y,0,,,,﹣2a2b3c中是单项式的个数有()A.2个B.3个C.4个D.5个2.根据等式变形正确的是()A.由﹣x=y,得x=2y B.由3x﹣2=2x+2,得x=4C.由2x﹣3=3x,得x=3D.由3x﹣5=7,得3x=7﹣53.按一定规律排列的一列数依次为:1,﹣,,﹣,,﹣,…按此规律排列下去,这列数中的第7个数为.4.计算﹣21÷(﹣1)×÷(﹣2)÷.5.已知多项式(a+3)x3﹣2x2y+y2﹣(5x3+y2+1)中,不含x3项,计算(a3﹣2a2+4a﹣1)的值.每日一练(二十七)1.已知数a在数轴上的位置如图所示,则a、﹣a、、﹣大小关系正确的是()A.﹣B.C.﹣a D.<a2.给定一列按规律排列的数:,,,,…,则这列数的第6个数是()A.B.C.D.3.某校组织学生春游,如果单独租用45座客车若干辆,刚好坐满,如果单独租用60座客车,可少租1辆,且余30个空座位.设该校参加春游的人数为x人,则列出的方程正确的是()A.=﹣1B.=﹣1C.=+1D.=+14.计算:﹣22﹣[﹣+(1﹣×0.6)÷22]5.有这样一道题,“计算(3x3﹣3x2y﹣2xy2)﹣(2x3﹣2xy2+3y3)+(﹣x3+3x2y﹣2y3)的值,其中x=,y=﹣1”甲同学把“x=”错抄成“x=﹣”,但他计算的结果也是正确的,试说明理由,并求出正确的结果.每日一练(二十八)1.比较大小:(1)﹣﹣,(2)﹣(﹣5)﹣|﹣5|.2.如图是一个简单的数值运算程序,当输入n的值为﹣3时,则输出的结果为.3.如图,下列各三角形中的三个数之间均具有相同的规律,根据此规律,最后一个三角形中y与n之间的关系是.4.如图,已知A,B两点在数轴上,点A表示的数为﹣10,OB=3OA,点M以每秒3个单位长度的速度从点A向右运动.点N以每秒2个单位长度的速度从点O向右运动(点M、点N同时出发)(1)数轴上点B对应的数是.(2)经过几秒,点M、点N分别到原点O的距离相等?每日一练(二十九)1.下列变形正确的是()A.若ac=bc,则a=bB.C.若a(c2+1)=b(c2+1),则a=bD.若2x=﹣2x,则2=﹣22.已知a,b,c是三个有理数,它们在数轴上的位置如图所示,则化简|a﹣b|+|c﹣a|﹣|b+c|+(c﹣a)的结果是()A.3a﹣c B.﹣2a+c C.a+c D.﹣2b﹣c3.下面四个图形中,经过折叠能围成如图所示的几何图形的是()A.B.C.D.4.按要求取近似值,6209500≈(精确到万位,并用科学记数法表示)5.已知关于x的方程3(x﹣1)=3m﹣6与2x﹣5=﹣1的解互为相反数,求(m+)3的值.每日一练(三十)1.式子﹣20﹣5+3+7读作()A.20,5,3,7的和B.20,5,3,7的差C.负20,负5,正3,正7的和D.3与7的和及20与5的差2.某商店出售某品牌的面粉,面粉袋上标有质量为(20±0.4)kg的字样,从中任取一袋面粉,下列说法正确的是()A.这袋面粉的质量可能为20.5kgB.这袋面粉的质量最多为20.4kgC.这袋面粉的质量一定为19.6kgD.这袋面粉的质量一定为20kg3.已知a、b都是不等于0的有理数,则的所有可能的值有()A.﹣1B.3C.﹣1或3D.1或34.解方程:﹣=2x+1;5.已知:x+y=2,xy=﹣3,求(x+xy)﹣[(xy﹣2y)﹣x]﹣xy的值.每日一练(三十一)1.如图是由一些黑点组成的图形,按此规律,在第n个图形中,黑点的个数有()A.4n﹣1B.n2﹣1C.n2+2D.2n+12.数383900用四舍五入法精确到千位取近似值后,用科学记数法应表示为.3..如图,射线OA位于北偏西30°方向,射线OB位于南偏西60°方向,则∠AOB=.4.关于x的方程bx﹣3=x有解,则b的取值范围是.5.有这样一道题,“计算(3x3﹣3x2y﹣2xy2)﹣(2x3﹣2xy2+3y3)+(﹣x3+3x2y﹣2y3)的值,其中x=,y=﹣1”甲同学把“x=”错抄成“x=﹣”,但他计算的结果也是正确的,试说明理由,并求出正确的结果.每日一练(三十二)1.下面平面图形中能围成三棱柱的是()A.B.C.D.2..若x=2是关于x的方程2x+3m﹣1=0的解,则m的值为.3.有下列三个生活、生产现象:①用两个钉子就可以把木条固定在干墙上;②把弯曲的公路改直能缩短路程;③植树时只要定出两棵树的位置,就能确定同一行所在的直线.其中可用“两点之间,线段最短”来解释的现象有(填序号).4.根据绝对值定义,若有|x|=4,则x=4或﹣4,若|y|=a,则y=±a,我们可以根据这样的结论,解一些简单的绝对值方程,例如:|2x+4|=5解:方程|2x+4|=5可化为:2x+4=5或2x+4=﹣5当2x+4=5时,则有:2x=1,所从x=当2x+4=﹣5时,则有:2x=﹣9;所以x=﹣故,方程|2x+4|=5的解为x=或x=﹣(1)解方程:|3x﹣2|=4;(2)已知|a+b+4|=16,求|a+b|的值;。

[绝对精品]2020-2021学年度第一学期河南省淮滨县第一中学七年级生物寒假作业——每日一练(2)

[绝对精品]2020-2021学年度第一学期河南省淮滨县第一中学七年级生物寒假作业——每日一练(2)

2020-2021学年度第一学期河南省淮滨县第一中学七年级生物寒假作业——每日一练(2)一、选择题1.下列有关生物与环境关系的叙述,正确的是()A.每一种生物仅具有适应生存环境的一种能力B.引入外来物种一定能提高生态系统的自动调节能力C.在一定区域内,生物与环境所形成的统一整体叫做生态系统D.增加大气中二氧化碳排放,增强温室效应,会提高光合效率,改善生态环境2.桃花在受精后,花的哪些结构会凋谢()①花瓣①雄蕊①花柱①花萼①子房A.①①①B.①①①C.①①①①D.①①①3.下列对于生物体结构层次的叙述,不正确...的是()A.多细胞生物体都具有细胞、组织、器官、系统和个体等结构层次B.构成生物体的各种细胞具有不同的形态结构,执行不同的功能C.动、植物体的多种组织都是通过细胞分裂、生长、分化形成的D.动、植物体各器官都由多种组织构成,它们分工合作形成统一整体4.光合作用的发现是众多科学家不断实验探索的结果,如图所示,下列有关实验的表达,正确的是( )A.海尔蒙特的实验说明,使柳树生长增重的物质来自土壤和水B.普利斯特利的实验证明,植物每时每刻都能更新污浊的空气C.萨克斯的实验中,光照后的叶片放入盛有酒精的小烧杯中直接加热,脱色后呈黄白色D.萨克斯的实验中,脱色后再用碘蒸气熏蒸黄白色的叶片,见光部分呈蓝色、遮光部分不变蓝5.在蚕豆根尖细胞和叶肉的细胞中,分别含有的能量转换器是()A.叶绿体,线粒体和叶绿体B.线粒体和叶绿体,线粒体C.线粒体和叶绿体,叶绿体D.线粒体,线粒体和叶绿体6.某同学为了探究萌发种子的呼吸作用,利用如下的装置进行了实验。

一段时间后向试管中加入澄清的石灰水,打开阀门并往瓶子里注入清水后发现,甲装置中澄清的石灰水变浑浊,乙装置中澄清的石灰水不变浑浊。

下列分析正确的是A.本实验结果说明萌发的种子呼吸释放出二氧化碳B.漏斗口塞上消毒棉是为了防止空气中的灰尘进入C.如果将两个装置都密封,实验会更快效果也更好D.若乙的石灰水稍浑浊,说明煮熟的种子呼吸较弱7.下列关于植物类群的叙述,正确的是()A.海带的结构层次是:细胞→组织→器官→植物体B.煤主要是由古代苔鲜植物的遗体经过漫长的时间和复杂的变化形成的C.种子比孢子的生命力强,是种子植物更适于陆地生活的重要原因D.银杏与西瓜的主要区别是种子外面有无种皮包被,银杏叶和果实都具有一定药用价值8.关于用天竺葵验证“绿叶在光下制造淀粉”的实验,有关说法错误的是A.遮光处理之前要将天竺葵暗处理一昼夜B.实验中的变量是光,需要在常温下进行C.实验结果应该是叶片未遮光部分变蓝色D.本实验只能证明光合作用需要光9.如图是生态系统中构成一条食物链的四种生物的X量分布模型图,下列说法错误的是()A.A B.B C.C D.D10.下列关于植物花和果实形成的说法不正确的是()A.桃的食用部分是由珠被发育成的B.玉米果穗常有缺粒现象,多由于传粉不足造成的C.一粒玉米的种皮和果皮紧密结合在一起,是一个果实D.桃花雄蕊的花粉内含有精子,雌蕊的胚珠内含有卵细胞11.下列四种表述中正确的是()A.动物需要吃东西,汽车喝汽油,所以都是生物B.岩石热晒雨淋后会开裂,说明它对外界刺激可以做出反应,因而是生物C.含羞草被人手一碰叶片就会闭合下垂,应该是动物D.小羊吃草长大,属于生命现象,所以羊是生物12.最早发现绿叶在光下能够产生淀粉的科学家是()A.施旺B.萨克斯C.弗莱明D.伊万洛夫斯基13.将某种绿色盆栽置于恒定光照的密闭容器中,测得一定时间内容器中二氧化碳减少量与温度变化的关系如图,则( )A.a点时,植物只进行光合作用,不进行呼吸作用B.b点时,植物既不进行光合作用,也不进行呼吸作用C.c点时,植物只进行呼吸作用,不进行光合作用D.在曲线ab段(不含b点),光合作用强于呼吸作用14.下列有关显微镜的叙述不正确...的是()A.在光线较暗的环境中,使用显微镜时应增大光圈并改用凹面镜B.观察标本时视野中出现一个污点,转动目镜污点不动,说明污点不在目镜上C.甲、乙两台显微镜,甲的目镜和物镜分别为10X ,10X;乙的目镜和物镜分别为10X,40X。

七年级数学期末复习作业 (每日一练)

七年级数学期末复习作业 (每日一练)

作业一:1、-3的绝对值等于( ) A.-3B. 3C. ±3D. 小于32、与2ab -是同类项的为( ) A.2ac - B.22abC.abD.2abc -3、下面运算正确的是( )A.3ab+3ac=6abcB.4a 2b-4b 2a=0 C.224279x x x += D.22232y y y -=4.不等式组2133x x +≤⎧⎨>-⎩的解集在数轴上表示正确的是5.(1)18(14)(18)13-+---- (2)713()6614÷-⨯ (3) 621123x x ++-<(4)74252154x x x x -≤+⎧⎨-<-⎩6、如图,B ,C 是线段AD 上任意两点,M 是AB 的中点,N 是CD 中点.(1)若MN =10cm ,BC =4cm ,求线段AD 的长. (2)若MN =a ,BC =b ,求线段AD 的长作业二:1.5-= .2.已知∠A =40°,则∠A 的补角等于 °. 2.小明从起点出发沿着一条直路跑了3km 后,再以4km/h 的速度往前走了th ,小明离起点 km .3.请把下列各数填在相应的集合内+4,-1,12--,27⎛⎫-+ ⎪⎝⎭,-(-2),0,2.5,π,-1.22,100% 正数集合:{…} 非负整数集合:{ …} 负分数集合:{…}4计算:(1)2346+=-x x (2) 1615312=--+x x(3)解不等式组()5931311122x x x x ⎧-<-⎪⎨-≤-⎪⎩并写出它的整数解.5.如图,直线AB 与CD 相交于点D ,OE ⊥AB ,OF ⊥CD . (1)图中∠AOF 的余角有 ;(把符合条件的角都填出来)(2)如果∠AOD =140°,那么根据 , 可得∠BOC = 度;(3)∠EOF =15∠AOD ,求∠EOF 的度数.作业三:1、下列四个式子中,是方程的是( ) A.1+2+3+4=10 B.23x - C.21x = D.231-=2、已知方程210k xk -+=是关于x 的一元一次方程,则方程的解等于( )A.-1B.1C.12 D.-123.单项式-223x y的系数是 .4.太阳的半径大约是696000千米,用科学计数法可表示为 千米5.(1)()157362912⎛⎫-+⨯- ⎪⎝⎭(2)()()()32010223251--⨯-+---6.我们定义一种新运算:a*b =2a -b +ab(等号右边为通常意义的运算): (1)计算:2*(-3)的值;(2)解方程:3*x =12*x .7.如图,直线AB 、EF 相交于点D ,∠ADC =90°.若∠1与∠2的度数之比为1:5,求∠CDF 、∠EDB 的度数.作业四:1.-14的相反数等于 A .14 B .-14C .4D .-42.已知13,π,-0.618 ,1.01,-34,其中无理数的个数A .1B .2C .3D .43.下列图形中经过折叠能围成一个棱柱的是4.“比a 的32大1的数”用代数式表示是 A .32a -1 B .23a +1C .23a -1 D .32a +15.如图,直线AB 与直线CD 相交于点O ,E 是∠AOD 内一点,若OE ⊥AB ,∠BOD =45°,则∠COE 的度数是 ( ) A .125° B .135° C .145 D .155°6.(1)8×(-1)2-(-4)+(-3);(2)111457323--+(3)x -x -12=2-x +25 (4)4x -1.50.5-5x -0.80.2=1.2-x0.1作业五:1、写出满足下列条件的一个一元一次方程:①未知数的系数是-1;②方程的解是3,这样的方程可以是:____________ .2、设某数为x ,它的2倍是它的3倍与5的差,则列出的方程为_________ .3.如图所示,一副三角板(直角顶点重合)摆放在桌面上,若∠AOD=150°,则∠BOC 等于 ( )A 、30°B 、45°C 、50°D 、60°3.一个物体的三个视图如图所示,则该物体是( )A .圆锥B .球C .圆柱D .长方体 5.如图,将周长为8的△ABC 沿BC 方向平移1个单位得到△DEF ,则 四边形ABFD 的周长为A .6B .8C .10D .12 6.在同一平面内有三条直线,如果只有两条平行,那么它们的交点个数为( )A .0B .1C .2D .37.已知点C 在线段AB 上,则下列条件中,不能确定点C 是线段AB 中点的是( )A .AC =BCB .AC +BC =AB C .AB =2ACD .BC =12AB 8.已知2x 6y 3和-13x 3m y n 是同类项,则9m 2-5mn -17的值是 .9.关于x 的方程234x m x -=-+与2m x -=的解互为相反数.(1)求m 的值;(2)求这两个方程的解.主视图左视图俯视图作业六:1.若22(32)0x y -++=,则x y 的值是 ( )A.49 B.49- C.43- D.432.数轴上表示6的点,移动了3个单位长度后,这个点表示的数是 ( ) A.3 B.9 C.-3 D.3或93.已知代数式x +2y 的值是3,则代数式2x +4y +1的值是 ( ) A. 1 B. 4 C. 7 D. 不能确定 4、如图,若添上一个正方形,使之能折叠成一个正方体,且使相对面上的两个数字之和相等,则添上的正方形上的数字应为 ,共有 种不同添加的方法.5(1)4―||―6-3×⎝ ⎛⎭⎪⎫-13 ; (2)()()241110.5233⎡⎤---⨯⨯--⎣⎦6.某商场将进货价为30元的台灯以40元的销售价售出,平均每月能售出600个.市场调研表明:当销售价每上涨1元时,其销售量就将减少10个.若设每个台灯的销售价上涨a 元. (1)试用含a 的代数式填空:①涨价后,每个台灯的销售价为_______元; ②涨价后,每个台灯的利润为_______元;③涨价后,商场的台灯平均每月的销售量为_______台.(2)如果商场要想销售利润平均每月达到10000元,商场经理甲说“在原售价每台40元的基础上再上涨40元,可以完成任务”,商场经理乙说“不用涨那么多,在原售价每台40元的基础上再上涨10元就可以了”,试判断经理甲与乙的说法是否正确,并说明理由.作业七:1.-5的倒数等于 A .5B .-15C .5D .152.下列各式计算正确的是A .6a +a =6a 2B .-2a +5b =3abC .4m 2n -2mn 2=2mnD .3ab 2-5b 2a =-2ab 23.有时需要把弯曲的河流改直,以达到缩短航程的目的,这样做的依据是_____________________________;4.如果你想将一根细木条固定在墙上,至少需要钉2个钉子,这一事实说明_________________________________.5.如图是一个简单的数值运算程序,当输入n 的值为4时,则输出的结果为 .6(1)()4111312534666⎛⎫-⨯-+-⨯+⨯ ⎪⎝⎭(2)()32142315211⎛⎫-÷-+--⨯ ⎪⎝⎭7.已知关于x 的方程4x +2m +1=2x +5.若该方程的解与方程2y -1=5y +7的解相同,求m 的值;8.如图,直线AB 和CD 相交于点O ,∠BOD 与∠BOE互为余角,OF 平分∠BOC ,∠AOC =52°.求∠BOE 和∠EOF 的度数.作业八1.单项式5223z y x -的系数是 ;若72+-n m b a 与443b a -是同类项,则m +n = .2.据统计,全球每分钟约有8500000吨污水排入江河湖海,则每分钟的排污量用科学记数法表示应是 吨.3.如图,直线AB 和直线CD 交于点O , EO ⊥CD , 垂足为O ,则∠AOE和∠DOB 的关系是 ( )A. 大小相等B. 对顶角C. 互为补角D. 互为余角4.如图,A 、B 、C 、D 是直线l 上顺次四点,M 、N 分别是AB 、CD 的中点,且MN =6cm ,BC =1cm ,则AD 的长等于cm .5.已知∠α是锐角,∠α与∠β互补,∠α与∠γ互余,则∠β-∠γ的值等于( ).A .45°B .60°C .90°D .180° 6.点P 是直线l 外一点,A 、B 、C 为直线l 上的三点,PA =4cm ,PB =5cm ,PC =2cm ,则点P 到直线l 的距离( )A .等于2 cmB .小于2cmC .大于2cmD .不大于2cm 7.已知∠AOB =30°,自∠AOB 顶点O 引射线OC ,若∠AOC :∠AOB =4:3,那么∠BOC 的度数是( )A .10°B .40°C .70°D .10°或70°7.(1)化简求值:()()22222722334a b a b ab a b ab +--- 其中2-=a 、3=b(2)已知关于x 的方程m xm 22=+的解与方程2x -1=3的解相同,求m 的值E O D C BA作业九:1.如果一个角的补角是150°,那么这个角的余角是 °。

2020年译林版七年级(上)英语每日一练2(Unit4)

2020年译林版七年级(上)英语每日一练2(Unit4)

七年级(上)英语每日一练2(Unit4)一、完形填空I live in a wonderful neighbourhood. My neighbours are all very nice and kind, 1the best of them is Mr Lee. He lives on the left of my house. He is a 2 in a hospital. He has two sons and one daughter. One of his sons is my classmate,so I often 3 their house. Every time I go to their home, Mr Lee welcomes me with a warm smile. Mr Lee is very 4 .If we have any health problem,he is always 5 to help us. And he will never ask us for money. Mr Lee is also a person with a sense of humour(幽默感). He enjoys telling us jokes(笑话)and making us laugh. 6 in our neighbourhood thinks highly of him.Peter is also one of my neighbours; he does 7 in all his lessons. When I have some questions, I will ask him for help. We often play football together after school; sometimes we go 8 in the swimming pool. We like chatting with each other on his balcony(阳台). We can sit there and look out at the beach and the sea. After dinner, we often watch TV and enjoy cups of tea. The best place for us to stay is the 9 because we like eating.We are very 10 to live in a neighbourhood like chat; we often help each other. We are here like a big family. What about your neighbourhood? Please let me know.( )1.A. so B. if C. but D. because ( )2.A. doctor B. driver C. waiter D. postman ( )3.A. clean B. notice C. visit D. stay( )4.A. busy B. helpful C. polite D. old( )5.A. careful B. unhappy C. busy D. willing( )6.A. Everyone B. Someone C. Everything D. Something ( )7.A. weak B. well C. good D. fine( )8.A. shopping B. running C. fishing D. swimming ( )9.A. kitchen B. study C. bathroom D. bedroom ( )10.A. happy B. worried C. friendly D. funny二、阅读理解AIt is eight o'clock in the morning. The children go to school by car every day,but this morning they are going to school on foot. It is ten o'clock in the morning. Mrs Sawyer usually stays at home in the morning,but this morning, she is going to the shops. It is four o'clock in the afternoon. Mrs Sawyer usually drinks tea in the living room at the moment. But this afternoon,she is drinking tea in the garden. It is six o'clock in the evening.The children usually do their homework at the moment,but this evening,they are not doingtheir homework. They are playing in the garden. It is nine o'clock at night. Mr Sawyer usually reads his newspapers at night. But he's not reading his newspapers tonight. At the moment,he's reading an interesting book.( )1 .Mrs Sawyer is going to this morning.A. stay at homeB. go shoppingC. drink teaD. watch TV ( )2 .Mrs Sawyer usually drinks tea at in the living r room.A. 8:00B. 16: 00C. 18:00D. 21:00( )3 .Are the children doing their homework at six o'clock in the evening?A. Yes,they do.B. No,they don't.C. Yes,they are.D. No,they aren't.BAmy's apartment building is in the centre(中心)of town. Amy is very happy there because the building is in a very convenient(方便的)place. Across from the building, there's a bank, a post office and a restaurant. Next to the building, there's a drug store and a launderette(洗衣店). Around the corner(角落)from the building, there are two supermarkets.There's a lot of noise near Amy's apartment building because there are a lot of cars on the street,and there are a lot of people on the sidewalks(人行道)all day and all night. However, Amy isn't very upset(苦恼的)about the noise in her neighbourhood(街区). It's a very busy place, but it's a convenient place to live.( )1 .Where is Amy's apartment building?A. In the country.B. In the centre of town.C. Near a school.D. Near a bus station.( )2 .What's across from her building?A. A park,a post office and a restaurant.B. A bank,a post office and a school.C. A bank,a post office and a restaurant.D. A park,a supermarket and a restaurant.( )3 .Is there a launderette near her building?A. Yes,there is.B. No,there isn't.C. There is.D. There isn't.( )4 .Why is there a lot of noise near Amy's building?A. Because there are a lot of cars on the street,and there are a lot of people on thesidewalks all day and all night.B. Because there are two supermarkets around the corner from the building.C. Because there's a drug store next to the building.D. Because there's a launderette next to the building.三、信息还原根据对话内容,从方框中选出能填入空白处的最佳选项选项。

苏科版七年级上册数学期末复习天天练2

苏科版七年级上册数学期末复习天天练2

初中数学试卷期末真题天天练(3)1.9时45分时,2.近年来,汉语热在全球范围内不断升温. 汉语的人数达1.5亿.将1.5亿用科学记数法表示为 .3.9时45分时,时钟的时针与分针的夹角是 .4.点P 为线段AB 上一点,且AP =32PB ,若AB =10cm ,则PB 的长为 . 5.小明与小彬骑自行车去郊外游玩,事先决定早晨8点出发,预计每小时骑7.5千米,上午10时可到达目的地. 出发前他们决定上午9点到达目的 地,那么实际每小时要骑 千米.6. 平面内两条直线最多有1个交点,三条直线最多有3个交点,四条直线 最多有6个交点,…,那么五条直线最多有 个交点.7.()⎥⎦⎤⎢⎣⎡--÷-⨯--223351321 1615312=--+x x8.)3123()31(22122y x y x x +-+--,其中x ,y 满足(x -2)2+|y +3|=09.如图,点C 是线段AB 的中点,点D 是线段AC 的中点,已知图中所有..线段..的长度之和为26,求线段AC 的长度. 10.市百货商场元月一日搞促销活动,购物不超过200元不给优惠;超过200元,而不足500元优惠10%;超过500元的其中500元按9折优惠,超过部分按8折优惠. 某人两次购物分别用了134元和466元. 问:(1)此人两次购物其物品如果不打折,值多少钱?(2)在此活动中,他节省了多少钱?(3)若此人将两次购物的钱合起来购相同的商品是更节省还是亏损?说明你的理由.11.若不等式组()231132x x x +<⎧⎪⎨>-⎪⎩,的整数解是关于x 的方程2x -4=ax 的根,求a 的值12.如果关于x 的不等式组5191x x x m +>+⎧⎨>+⎩,的解集是x>2,那么m 的取值范围?期末真题天天练(4)1. 计算:=--+-++-213)878(212836 . 2. 如果-2≤x ≤2,那么代数式()212-+x 的最大值为 ,最小值为 .3. 如图,从点O 引出6条射线OA 、OB 、OC 、OD 、OE 、OF ,且 ∠AOB =100°,OF 平分∠BOC ,∠AOE =∠DOE ,∠EOF =140°,则∠COD 的度数为 . 4. 用⊕表示一种运算,它的含义是:B A ⊕=()()111++++B A x B A .如果3512=⊕,那么=⊕43 .5. 已知:1+3=4=22;1+3+5=9=32;1+3+5+7=16=42;1+3+5+7+9=25=52,…,根据前面各式的规律,以下等式(n 为正整数),① 1+3+5+7+9+…+(2n -1)=2n ;②1+3+5+7+9+…+(2n +3)=()23+n ;③ 1+3+5+7+9+…+2013=21007 ; ④101+…+2013=21007-250,其中正确的有 个.6. (1)2152146x x -+-≥-; (2)()33514622.33x x x x +>-⎧⎪⎨--≥⎪⎩,7. 已知:2222424,363,A x xy y B x xy y =-+=-+23,16,1,x y x y ==+=求()()423A A B A B +--+⎡⎤⎣⎦的值.8. 一群猴子结伴去偷桃,在分桃时;如果每只猴子分3个,那么还剩59个;如果每只猴子分5个,那么有一只猴子分得的桃不足5个,你能求出有多少只猴子,多少个桃吗?9. 已知∠AOB 是一个直角,作射线OC ,再分别作∠AOC 和∠BOC 的平分线OD 、OE .(1)如图1,当∠BOC =70°时,求∠DOE 的度数;(2)如图2,当射线OC 在∠AOB 内绕O 点旋转时,∠DOE 的大小是否发生变化若变化,说明理由;若不变,求∠DOE 的度数;(3)当射线OC 在∠AOB 外绕O 点旋转时,画出图形....,判断∠DOE 的大小是否发BO F DCA生变化. 若变化,说明理由;若不变,求∠DOE的度数.(图1)(图2)。

七年级数学下册期末复习每日一练

1.解方程组24824x yx y-=⎧⎨+=-⎩①②.2.求不等式组20210xx-≤⎧⎨->⎩的整数解.3.如图,已知∠1=∠2,∠3=∠4,求证:BC∥EF.完成推理填空:证明:因为∠1=∠2(已知),所以AC∥(),所以∠=∠5(),又因为∠3=∠4(已知),所以∠5=∠(等量代换),所以BC∥EF().4.对于x,y定义一种新运算“φ”,xφy=ax+by,其中a,b是常数,等式右边是通常的加法和乘法运算.已知3φ5=15,4φ7=28,求1φ1的值.1. 育人中学开展课外体育活动,决定开设A:篮球、B:乒乓球、C:踢毽子、D:跑步四种活动项目.为了解学生最喜欢哪一种活动项目(每人只选取一种),随机抽取了部分学生进行调查,并将调查结果绘成如甲、乙所示的统计图,请你结合图中信息解答下列问题.(1)样本中最喜欢A 项目的人数所占的百分比为,其所在扇形统计图中对应的圆心角度数是度;(2)请把条形统计图补充完整;(3)若该校有学生1000人,请根据样本估计全校最喜欢踢毽子的学生人数约是多少?2.在平面直角坐标系中,O为坐标原点,A(—2,3),B(2,2).(1)画出三角形OAB;(2)求三角形OAB的面积;(3)若三角形OAB中任意一点P(x0,y0)经平移后对应点为P1(x0+4,y0-3),请画出三角形OAB平移后得到的三角形O1A1B1,并写出点O1、A1、B1的坐标.3.水果店以每千克4.5元进了一批香蕉,销售中估计有10%的香蕉正常损耗.水果店老板把售价至少定为多少,才能避免亏本?213456-1-21-3-41234-1-2-3y1.为了抓住集安国际枫叶旅游节的商机,某商店决定购进A、B两种旅游纪念品.若购进A种纪念品8件,B种纪念品3件,需要950元;若购进A种纪念品5件,B种纪念品6件,需要800元.(1)求购进A、B两种纪念品每件各需多少元;(2)若该商店决定购进这两种纪念品共100件,考虑市场需求和资金周转,用于购买这100件纪念品的资金不少于7500元,但不超过7650元,那么该商店共有几种进货方案?(3)若销售每件A种纪念品可获利润20元,每件B种纪念品可获利润30元,在第(2)问的各种进货方案中,哪一种方案获利最大?最大利润是多少元?2.如图,点E在AC的延长线上,下列条件能判断AB∥CD的是()①∠1=∠2;②∠3=∠4;③∠A=∠DCE;④∠D+∠ABD=180°A .①③④B.①②③C.①②④D .②③④解析:2134ABCDE1.不等式组211420xx->⎧⎨-⎩,≤的解集在数轴上表示为()解析:2.解方程组:{x2−y+13=13x+2y=103.用代入法解方程组:{2x−5y=−3−4x+y=−34.计算:(−1)2024+√−83+|1−√3|+√165.求x的值:8(x−1)3+27=01.若m,n为实数,且|m+√3|与√n−2互为相反数,求(mn)2的值.2.求下列各式中x的值:(1)2x3=-16; (2)4(x-1)2=64.3.如图,直线AB与CD相交于点O,OE平分∠AOD.若OF∠OE,试说明OF平分∠BOD.4.已知点P(2a-2,a+5),解答下列各题.(1)若点P在x轴上,求点P的坐标.(2)点Q的坐标为(4,5),直线PQ∠y轴,求点P的坐标.1. 某市为提倡节约用水,准备实行自来水“阶梯计费”方式,用户用水不超出基本用水量的部分享受基本价格,超出基本用水量的部分实行超价收费.为更好地决策,自来水公司的随机抽取了部分用户的用水量数据,并绘制了如图不完整的统计图(每组数据包括在右端点但不包括左端点),请你根据统计图解答下列问题:(1)此次抽样调查的样本容量是_____.(2)补全频数分布直方图,并求扇形图中“15吨~20吨”部分的圆心角的度数.(3)如果自来水公司将基本用水量定位每户25吨,那么该地区6万用户中约有多少用户的用水全部享受基本价格?2. 数学课上,老师出了一道题:比较√19-23与23的大小.小华的方法:因为√19 >4,所以√19-2 2,所以√19-2323(填“>”或“<”).小英的方法:√19-23-23=√19-43.因为19>42=16,所以√19-4 0,所以√19-430,所以√19-2323(填“>”或“<”).(1)根据上述材料填空;(2)请从小华和小英的方法中选择一种比较√6-14与12的大小.1.解下列不等式和不等式组,并把解集表示在数轴上.(1)2(x+3)-1≥3x+2 (2){−3(x+1)−(x−3)<8 2x+13−1−x2≤12.把一部分书分给几名同学,如果每人分3本,则余8本;如果前面的每名同学分5本,那么最后一人就分不到3本(包含分不到书的情况),这些书有多少本?共有多少人?3.为更好的治理水质,保护环境,市治污办事处预购买10台污水处理设备,现有A、B:询问商家得知:购买一台A型设备比购买一台B型设备多2万元,购买2台A型设备比购买3台B型设备少6万元,根据以上条件.(1)求a、b的值;(2)市污水处理办公室由于资金缺乏,购买污水处理设备的资金最多105万元,你认为该有几种购买方案?(3)在(2)的情况下,若每月污水处理量要求不低于2040吨,为节约资金,请你帮污水处理办事处选取一种最省钱的方案?1.如图,若在中国象棋盘上建立平面直角坐标系,使“帅”位于点(-1,-1),“马”位于点(2,-1),则“兵”位于点()A.(﹣1,2)B.(﹣3,2)C.(﹣3,1)D.(﹣2,3)2.郑州市某区为了解参加2021年中考的8900名学生的体重情况,随机抽查了其中1500名学生的体重进行统计分析,下列叙述正确的是()A.8900名学生是总体B.每名学生是总体的一个个体C.1500名学生的体重是总体的一个样本D.以上调查是普查3.若﹣2x a y与5x3y b的和是单项式,求(a+b)2的平方根.4.在平面直角坐标系中,△ABC经过平移得到三角形△A`B`C`,位置如图所示:(1)分别写出点A、A`的坐标:A ,A` ;(2)若点M(m,n)是△ABC内部一点,则平移后对应点M的坐标为 ;(3)求△ABC的面积.5.已知5a+2的立方根是3,3a+b﹣1的算术平方根是4,c是√13的整数部分.(1)求a,b,c的值;(2)求3a﹣b+c的平方根.1. 某中学组织本校教师开展线上教学,为了解学生线上教学的学习效果,决定随机抽取八年级学生部分学生进行质量测评,根据测试的数学成绩绘制统计表和频数分布直方图.请根据所给信息,解答下列问题:(1)求a 和b ;(2)求此次抽样的样本容量,并补全频数分布直方图;(3)已知该年级有800名学生参加测试,请估计该年级数学成绩为优秀(80分及以上)的人数.2. 如图,已知直线AB 与CD 交于点O ,OM∠CD ,OA 平分∠MOE ,且∠BOD =28°,求∠AOM ,∠COE 的度数.3. 若关于x ,y 的方程组{x +3y =4m +1x −y =3 的解满足x+y=4,求m 的值.1.计算:−12024+√25−2×√−183−|3−π|2.用两种方法解二元一次方程组:{x−y=44x+2y=13.解不等式组,{2x≥5x−34x+23>x 并写出它的所有整数解.4.如图,在边长为1个单位长度的小正方形网格中建立平面直角坐标系,已知三角形ABC 的顶点A的坐标为A(-1,4),顶点B的坐标为(-4,3),顶点C的坐标为(-3,1).(1)把三角形ABC向右平移5个单位长度,再向下平移4个单位长度得到三角形A'B'C',请你画出三角形A'B'C';(2)请直接写出点A’,B',C'的坐标;(3)求三角形ABC的面积.1.近日教育部正式印发《义务教育课程方案》并发布《义务教育劳动课程标准(2022年版)》,今秋开学起,劳动将正式成为中小学的一门独立课程。

青岛版2020七年级数学下册期末综合复习基础训练题2(附答案)

青岛版2020七年级数学下册期末综合复习基础训练题2(附答案)1.某商场销售一批名牌衬衫,平均每天可售出20件,每件盈利40元,为扩大销售,尽快减少库存,商场决定釆取降价措施,调查发现,每件衬衫,每降价1元,平均每天可多销售2件,若商场每天要盈利1200元,每件衬衫应降价( )A .5元B .10元C .20元D .10元或20元2.如图,在△ABC 中,CD 平分∠ACB 交AB 于点D ,过点D 作DE ∥BC交AC 于点E,若∠A=54°,∠B=48°,则∠CDE 的大小为( )A .44°B .40°C .39°D .38°3.下列式子中,计算结果为2215x x +-的是( )A .(5)(3)x x +-B .(5)(3)x x -+C .(5)(3)x x ++D .(5)(3)x x -- 4.(2011•恩施州)下列运算正确的是( )A .a 6÷a 2=a 3B .a 5﹣a 3=a 2C .(3a 3)2=6a 9D .2(a 3b )2﹣3(a 3b )2=﹣a 6b 25.(x +3ab )(x -3ab )等于( )A .x 2 -9a 2b 2B .x 2 -9ab 2C .x 2 -ab 2D .x 2 -a 2b 26.下列说法正确的个数( )①线段有两个端点,直线有一个端点;②点A 到点B 的距离就是线段AB ;③两点之间线段最短;④ 若AB=BC ,则点B 为线段AC 的中点;⑤同角(或等角)的余角相等.A .4个B .3个C .2个D .1个7.平面直角坐标系内AB ∥y 轴,AB=5,点A 的坐标为(﹣5,3),则点B 的坐标为( )A .(﹣5,8)B .(0,3)C .(﹣5,8)或(﹣5,﹣2)D .(0,3)或(﹣10,3)8.如图,将一张正方形纸片剪出一个边长为m 的正方形之后,剩余部分可剪拼成一个矩形(不重叠无缝隙),若拼成的矩形一边长为3,另一边为23m +,则原正方形边长是 ( )A .6m +B .3m +C .23m +D .26m +9.若12512'∠=o ,225.12∠=o ,325.2∠=o ,则下列结论正确的是( )A.∠1=∠2 B.∠2=∠3 C.∠1=∠3 D.∠1=∠2=∠3 10.下列各方程组中,不是二元一次方程组的是()A.2583x yx y-=⎧⎨+=⎩B.113x zx y+=⎧⎪⎨=⎪⎩C.3225x yx y-=⎧⎨+=⎩D.1122311332x yx y⎧+=⎪⎪⎨⎪-=⎪⎩11.-0.000031用科学记数法表示为:__________________________12.钟面上8 点30 分时,时针与分针的夹角的度数是________ .13.已知一点到圆上的最短距离是2,最长距离是4,则圆的半径为____.14.已知4x=2x+3,则x=_________.32÷8n-1=2n,则n=_________.15.(x+2y-3)(x-2y-3)=_____-_____.16.有长为20m的铁栏杆,利用它和一面墙围成一个矩形花圃ABCD(如图),若花圃的面积为48m2,求AB的长.若设AB的长为xm,则可列方程为______.17.若2330x y++=,则927x y⋅=________.18.把多项式4m2﹣16n2分解因式的结果是_____.19.已知方程132x y-=,用含x的代数式表示y=_________________________。

七年级下册数学每日一练

每日一练(1)时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题:1.下列说法正确的是( )A. 3是9的算术平方根B. -2是4的算术平方根C.(-2)²的算术平方根是-2D. -9的算术平方根是3 2.与51+最接近的整数是()A. 4B. 3C. 2D. 1 二、填空题:3.①64的算术平方根是______;②412的算术平方根是______.4.已知a 的算是平方根是3,b 的算术平方根是4,则b a +的算术平方根是_________. 三、解答题:5.规律探究:(1)求222220,)32(,)21(,)2(,3--的值;(2)对于任意数a ,探究2a 等于多少?(3)根据(2)中的结论,则._________)21(2=-每日一练(2)时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题:1.下列说法正确的是( )A. 9的平方根是±3,应表示为9²=±3B. ±3是9的平方根,应表示为±9=3C. 9开平方能得到9的平方根,应表示为9=3D.9的算术平方根是3,应表示为9=32.下列说法:①±5是25的平方根;②49的平方根是-7; ③8是16的算术平方根;④-3是9的平方根.其中正确的个数是( )A. 1B. 2C. 3D. 4 二、填空题: 3.972的平方根是_______;81的平方根是_________. 4.若a 的平方根等于a ,则a =___________.三、解答题: 5. 规律探究:(1)求22222)0(,)2549(,)94(,)9(,)4(的值; (2)对于任意数a ,探究2)(a 等于多少?(3)根据(2)中的结论,则._________)14.3(2=-π每日一练(3)时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题:1.(-2)²的平方根是( )A. 2B. -2C. ±2D. 22.下列各式正确的是( ) A.(±41)=21 B.211412= C.4324321694=+=+D. 671371322=-=-二、填空题: 3.已知577--+-=x x y ,则.__________=+y x4.若0910=++-y x ,则.__________=+y x三、解答题: 5.求下列各式中x 的值:(1)2252=x ; (2)049812=-x每日一练(4)时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题:1.下列语句正确的是( )A. 负数没有立方根B. 8的立方根是±2C. 立方根等于它本身的数只有±1D. 3388-=-2.已知5848.02.0,260.1233≈≈,则3002.0的值约为( )A. 0.1260B. 0.0126C. 0.05848D. 5.848 二、填空题: 3.若8=x ,则._________3=-x4.比较37,5,2的大小,并用“<”号连接起来:______________.三、解答题:5.如果43+-b b a 为b a 3-的算术平方根,221+-a a 为21a -的立方根,求b a 32-的立方根.每日一练(5)时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题:1.下列说法正确的是( )A. 无限小数都是无理数B. 带根号的数都是无理数C. 无限不循环小数都是无理数D.无理数都是开方开不尽的数2.下列各数: 131131113.0,8,14159.33-(每相邻两个3之间依次多一个1),71,25,--π中,无理数有( )A. 1个B. 2个C. 3个D. 4个 二、填空题: 3.5-的绝对是_______;51-的相反数是_________.4.满足32<<-x 的整数x 有______________________.三、解答题:5.把下列各数填入相应的集合内:21-,3-,32,29,38--,0,π-, 1010010001.3(每相邻两个1之间依次多一个0).有理数集合:{ …} 无理数集合:{ …} 整数集合: { …} 分数集合: { …} 负实数集合:{ …}绵阳中学育才学校初一数学组每日一练(22)时间10~15min 总分100出题人: T班级___________ 姓名__________ 得分_________一、 选择题:1.已知2(2)30a b -++=,则(,)P a b --的坐标为( )A.(2,3)B.(2,-3)C.(-2,3)D.(-2,-3)2.已知点(,)P x y 在第四象限,且23,25x y ==,则P 点坐标是( )A.(-3,5)B.(5,-3)C.(3,-5)D.(-3,-5) 二、填空题:3.若点(,)a b -在第二象限,则点2(,)a b -在第______象限,点(25,34)a b --在第____象限.4.已知点(3,2)P a a -+,若点P 在x 轴上,则a=______;若点P 在y 轴上,则a=______. 三、解答题:已知点M(3a -8,a -1),分别根据下列条件求出点M 的坐标. (1) 点M 在y 轴上;(2) 点M 在第二、四象限的角平分线上; (3) 点N(3,-6),直线MN ∥x 轴.绵阳中学育才学校初一数学组每日一练(16) 时间5~10min 总分100 出题人:T班级:_________ 姓名:_________ 得分:________ 一、 选择题:1. 在45,3.14,03-0.57-4-0.10100100013π⋅⋅⋅,,,,,,,这些数中,有理数有( )A.3个B.4个C.5个D.6个2.如图,点E 在AC 的延长线上,给出下列条件:⑴∠1=∠2 ;⑵∠3= ∠4 ;⑶∠A=∠DCE ;⑷∠D=∠DCE ;⑸∠A+∠ABD=180°;⑹∠A+∠ACD=180°.其中能判断AC ‖BD 的条件的有( ).A 、⑴⑶⑹B 、⑴⑷C 、⑵⑸D 、⑵⑷⑸二、填空题:3. 2−√5的相反数是____________;绝对值是_____________.4.将直尺和三角板按如图方式摆放,已知∠1=30°, 则∠2的大小是__________ 三、解答题:5.如图,已知DE ∥BC ,GF ⊥AB 于F ,∠1=∠2,判断CD 与AB 的位置关系,并说明理由.CA B DE1 2 34 1 2231AB CDEFG绵阳中学育才学校初一数学组每日一练(16) 时间5~10min 总分100 出题人:T班级:_________ 姓名:_________ 得分:________ 一、选择题:1.若2=253a b a b =+,,则所有可能的值为( )A.8B.8或2C.8或-2D.±8或±2 2.如图,已知a b ∥,直角三角板的直角顶点在直线b 上,若∠1=60°,则下列结论错误的是( ) A.∠2=60° B.∠3=60° C.∠4=120° D.∠5=40° 二、填空题:3.计算−22×(12)2+√−643÷|−2|=_____________4.如图,已知AB ∥DE ,∠ABC=70°,∠CDE=140°, 则∠BCD 的度数为_____________ 三、解答题:5.如图,∠1+∠2=180°,∠3=∠B ,求证:∠AED=∠ACB.12 3 45abABCD E70°140°123 4 ABC D EF绵阳中学育才学校初一数学组每日一练(65)时间5~10min 总分100 出题人:T 班级:_________ 姓名:_________ 得分:________1.对于数对(a,b)、(c,d),定义:当且仅当a=c且b=d时,(a,b)=(c,d);并定义其运算如下:(a,b)@(c,d)=(ac-bd,ad+bc),如(1,2)@(3,4)=(1×3-2×4,1×4+2×3)=(-3,10),若(x,y)@(1,-1)=(1,3),则y x的值是()A.-1B.0C.1D.22.在平面直角坐标系中,点P(3a-8,4-a)在第二象限,且该点到x,y轴的距离相等,则a=__________________3.解下列不等式组:3(2)45131 2x xxx x-+<⎧⎪⎨--≥+⎪⎩4.某商场销售A,B两种品牌的教学设备,这两种教学设备的进价和售价如表所万元。

苏科版数学七年级下册江苏省丹阳市云阳学校每日一练:11.4解一元一次不等式(2)

初中数学试卷
七年级数学每日一练 编号:201607050 内容:11.4 解一元一次不等式(2)编制:李金芳 互审:王红祥 终审:备课组 班级 姓名
一、 核心价值题
1.不等式2x +5>4x -1的解集是 .
2. 不等式8x -1≥6x -5的解集是 .
3.当a 时,代数式4a +3的值是正数;当a 时,它的值不大于5; 当a 时,它的值不小于2.
4.已知-1,5
23x -≤且x 为非负整数,那么x = . 5.不等式19-5x >2的正整数解是 .
6.当x _______时,代数式4
23x +的值是正数. 7.解下列不等式,并把解集在数轴上表示出来.
(1) 2x ﹣7<5﹣2x . (2)
(3)1)5(4)1(23-+>+-x x (4) 323125+<-+x x
二、知识与技能演练题:
8. 解不等式2(x﹣2)≤6﹣3x,并写出它的正整数解.
9.若不等式10(x+4)+x<62的正整数解是方程2(a+x)﹣3x=a+1的解,求的值.。

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世外中学--七年级期末复习每日一练(2)一.翻译1.在第五大道786号的洗衣店2.昨晚我的楼上邻居在他洗澡时绊倒了3.一罐油漆从梯子上调到了地上,洒了我整条裤子4.下次平安夜的时候,和你的家人待在一起,共进一顿丰盛的晚餐5.我在慢跑时穿过公园时,看到一个小女孩戳到了她自己的眼睛6.学生可能会觉得通过第一场考试的心理压力小了很多,但是当他们从分数银行“借分”时,他们同样会感受到“还分”的压力7.充满了欢笑与欢乐8.我们非常希望找到这个问题的满意解决方案9.下次你去看电影的时候,记得看一看电影指南10.她最喜欢的电影是关于在太空的宇航员们的一个大冒险11.尽管没有人在事故中受重伤,他还是不得不支付500美元12.当在一辆轻型货车中的女士开车穿过十字路口时,跑车中的男士没有在停车标志处停车13.春天让我想到在公园野餐14.在如此热的天气里一直站在太阳下太糟糕了15.没有必要担心失误,因为我有足够我们两个人的(量)16.Stevens的表演深得很多专业人士的赏识。

从那时开始,他便开始受到其他导演和制片人抛出的橄榄枝二.单项选择1.Which underlined part in the following words is pronounced different?A.robberyB.mountainC.circusD.Ohio2.Which underlined part in the following words is pronounced different?A.pokeB.roller-bladesC.donutD.tomorrow3.Which underlined part in the following words is pronounced different?A.temperatureB.princessC.circusD.diary4.Little John apologized for hitting his younger brother in _____ stomach.A.hisB./C.theD.a5.I fell off my bicycle this morning and now my knees _____ when I bend them.A.are hurtB.are hurtingC.hurtD.hurts6.He _____ go to work the next morning because the doctor said he _____a good rest.A.didn’t need to; neededB.needn’t, needsC.didn’t need; needsD.needn’t; needed7.--When _____ the train ______?-- In two hours.A.will; leaveB.do; leaveC.is; leavingD.does; leave8.In ancient times, wooden stick(木棍)____ counting.A.were used toed toC.are used toD.were used for9.I have looked for my key _____ my house, but I still can’t find it.A.ofB.toC.withD.for10.-- What is in the refrigerator?-- ______. We have to buy something in the supermarket.A. NoneB. No oneC. NoD. Nothing11.Wearing formally to _____ a party is a way of showing respect.A.attendB.joinC.take part inD.join in三.词性转换1.Believe that breaking a mirror brings seven years of bad __________ (lucky) is a common ___________ (superstition) behavior.2.The busy mail __________ (carry) were happy to know that their __________ (favor) Italian restaurants started to offer free __________ (deliver).3.Tom likes movies with a lot of __________ (act) but his __________ (old) brother prefers cartoons.4.She is one of the greatest British __________ (poem).5.To tell the truth, I have never heard a ___________ (silly) excuse than this one.6.That an Asian doctor was evicted out of the plane by force is __________ (definite) the ___________ (sadly) news I have ever heard this week.7.Good performance of a team in a match is often the result of the direct guidance(指导)of good __________(coach).8.It is a ___________ (secret) responsibility to receive phone calls and arrange meeting schedules for the general manager.9.All the students are looking forward to having __________ (out) when spring is coming.10.The stubborn heavy smoker never took others’ advice and he __________ (ending) up havinga terrible lung disease in hospital.四.时态填空1.He always ___________ (faint) at the sight of blood.2.If you get a flat while you __________ (ride), ___________ (show) your bike down and get it to the side of the road safely.3.There ___________ (not be) a lot of traffic if you set off earlier.4.The doctor tried everything he could _________ (save) the patient’s life, but he still __________ (die) at last.5.In the forest, the hard-working ant often sees the lazy grasshopper __________ (lie) on the ground without doing anything.6.The policeman __________ (fire) unless the murderer __________ (freeze) right now.7.All the birds on the branches __________ (fly) away because of the gunshot.8.Sorry, I ________ (not catch) what you said just now. I ________ (think) something else.9.How time flies! We __________ (graduate) from WFLA in two years’ time.五.改句子1.I have to fix the fence this afternoon.(否定句)I ___________ __________to fix the fence this afternoon.2.The Green family drove to the mountains to go camping.(划线提问)__________ ___________ the Green family drive to the mountains?3.What was his reaction to the terrible news?(同义句)How __________ he __________ __________the terrible news?4.Leave the door open when you go out, __________ __________?(反意疑问句)5.We were driving at 120 miles per hour when we crashed into that SUV.(划线提问)__________ __________ were you driving when we crashed into that SUV?6.It hasn’t rained since last month.(划线提问)_________ _________ hasn’t it rained?7.The man over there is a policeman.(划线提问)__________ _________the man over there?8.We don’t have a summer vocation in July, do we?(根据实际回答)_________, ________ ________.六.首字母AHappiness is a feeling that lights up your eyes, makes your steps light and makes you want to sing for no reason. Everyone wants to be happy. But sometimes, a guest comes in without invitation. It’s unhappiness. Don’t let it get you down. Send it away.When you are happy, the world feels like a better place. As the saying goes: When you smile, the world smiles with you; when you cry, you cry a_________. Wearing a smile makes you more charming and helps you to w_________ lots of friends. A good mood always gives you hope, which makes trouble and problems easier to handle.No matter how happy you are, it’s normal to feel angry, sad or gloomy once in a while. Life is full of ups and downs. We can’t change the way life is, but we can do our best to change a bad situation into a good one. To help us do this, it’s good to know some of the factors(因素)that i_________ happiness.One of the biggest factors is social relationships. People who are c_________ to family and friends are happier than people who don’t have those relationships. Talking and sharing is a good way to relax and build confidence. Knowing someone is there for you will make you braver and more outgoing.Another factor is work or school. If you enjoy school, even if you have lots of homework or extra classes, you will feel that your school life is meaningful and happy. But if you hate school, your negative attitude may c_________ you to feel bored and upset that you hate to do so much work.A t_________ factor is your attitude towards life. How do you feel if you fail in an exam? Maybe you think it’s unfair because you always study and should have got a good mark. You can’t stop blaming(责备)yourself. Or, maybe you accept it. You go through the paper carefully, find out why you made stupid mistakes, and tell yourself, “Take it easy! I’ll do better next time!”Your attitude makes a big d_________.Do you smile a lot or wear a long face most of the time?BIt is true that people with better education are usually able to get better paying jobs. In other words, they have more c_________ to choose a good job while people with little or no education don’t. It seems that the purpose of education is to make people get jobs. But this isn’t accepted by all people.Some people may think that a person should spend the best years of his life to get education only for a way of living. This was probably one of the earliest reasons of education. In fact, ifeducation is just a way of making a living, people don’t need to spend so much time s_________in school. People can get education for a living in a short time. Subjects like history and geography need not be taught to everyone. Even language and mathematics need not be taught in detail(详细地), either. Here it is clear that education is much more than j_________ teaching a man to get a way of living.Education is well-rounded and it is mainly for improving a man. It is not only to teach him to speak, read and write, but also d_________ his creative thinking and other abilities. After that, it is to make him a wise man and thankfully enjoy the achievements of human. Education is to make a man lead a better life. Educated people are expected to be able to listen to good music, read good books, watch plays and most of all take an i_________ in the world.I would agree that making a good living is an important reason for education, but certainly not the most important or the main reason.。

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