初一第二次月考试卷
七年级下册第二次月考试卷【含答案】

七年级下册第二次月考试卷【含答案】专业课原理概述部分一、选择题(每题1分,共5分)1. 下列哪种现象属于光的反射?A. 彩虹B. 镜子中的倒影C. 日食D. 月食2. 在下列选项中,哪个不是可再生能源?A. 太阳能B. 风能C. 煤炭D. 水能3. 下列哪个化学反应属于氧化反应?A. 铁生锈B. 灯泡发光C. 木头燃烧D. 酸碱中和4. 下列哪个不是生态系统的组成部分?A. 非生物环境B. 生产者C. 消费者D. 分解者5. 在下列天体中,哪个是离地球最近的恒星?A. 太阳B. 月亮C. 金星D. 北极星二、判断题(每题1分,共5分)6. 地球自转的方向是从西向东。
()7. 植物进行光合作用时,需要消耗氧气。
()8. 溶液是由溶剂和溶质组成的混合物。
()9. 动物细胞和植物细胞都有细胞壁。
()10. 食物链中,生产者总是位于第一级。
()三、填空题(每题1分,共5分)11. 光的传播速度在真空中是______。
12. 地球上的水循环包括蒸发、降水和______三个过程。
13. 人体所需的六大营养素包括蛋白质、脂肪、碳水化合物、维生素、矿物质和______。
14. 生物的基本单位是______。
15. 地球围绕太阳公转一周的时间称为______。
四、简答题(每题2分,共10分)16. 简述光合作用的基本过程。
17. 描述地球自转和公转的关系。
18. 解释什么是温室效应。
19. 简述血液循环的基本原理。
20. 解释遗传和变异的概念。
五、应用题(每题2分,共10分)21. 计算一个质量为5kg的物体在地球表面所受的重力。
22. 描述如何通过实验来观察植物的光合作用。
23. 设计一个实验来测试不同材料的热传导性能。
24. 解释如何通过食物链来分析生态系统中能量和物质的流动。
25. 描述如何通过观察星空来辨别方向。
六、分析题(每题5分,共10分)26. 分析为什么在夏天白天比冬天长。
27. 分析植物为什么需要进行光合作用。
七年级(上)第二次月考数学检测试卷(含答案)

七年级(上)第二次月考数学检测试卷(每小题3分,共30分) .在 8080080008.0 ,8 ,31.0 ,41, ,2 ,14.33--π(每两个8之间依次多1个0)这些数中,无理数的个数为( )A 、1个B 、2个C 、3个D 、4个 ,下列运算正确的是( )A 、2222=-xx B 、 2222555d c dc =+C 、xy xy xy =-45D 、532532m m m =+、将一元一次方程13321=--x 去分母,下列正确的是( )A 、1-(x -3)=1B 、3-2(x -3)=6C 、2-3(x -3)=6D 、3-2(x -3)=1下列近似数中,含有3个有效数字的是 ( ) A.5430 B.5.430×106C.0.5430D.5.43万.下列各式中去括号正确的是( )A 、22(22)22x x y x x y --+=-++B 、()m n mn m n mn -+-=-+-C 、(53)(2)22x x y x y x y --+-=-+D 、(3)3ab ab --+= 下列式子中: 12,b ,y x + ,032=-y ,ts 整式的个数为( )A 、2个B 、3个C 、4个D 、5个.下列说法中正确的是 ( . ) A.有理数与数轴上的点一一对应。
B.无限小数是无理数。
C.23-读作3-的平方 D.5的平方根是5±、哥哥今年15岁,弟弟今年9岁,x 年前哥哥的年龄是弟弟年龄的2倍,则列方程为( ) A、)9(215x x -=- B、)15(29x x -=- C、)9(215x x +=+ D、)15(29x x +=+ 9、如图,数轴上一动点A 向左移动2个单位长度到达点B ,再向右移动5个单位长度到达点C .若点C 表示的数为1,则点A 表示的数为 A .7B .3C .3-D .2-10,在甲组图形的4个图中,每个图是由4种简单图形A 、B 、C 、D(•不同的线段或圆)中的某两个图形组成的,例如由A 、B 组成的图形记为A ·B 。
2023-2024第二学期南通市启秀初一英语第二次月考试卷

2023第二学期初一第二次月考试卷二.单项选择(本小题共10小题,每小题1分,共10分)21.--Did you watch TV this morning? There was ___________ fire in the shopping mall last night? --Yes. Luckily, it was not ____________ very big one. No one got hurt.A./; theB. a; aC. the; /D. the; a【答案】B【解析】昨晚商场里有一场火,但不是很大的一场,都是泛指。
22.It’s hard to see traffic lights _____________ the thick fog(雾).A.acrossB. overC. fromD. through【答案】D【解析】穿过浓雾很难看到红绿灯。
23.--I’m hungry. Could I have some food?--Sure, you _________. I’ll _________ some at once.A.could; takeB. could; bringC. can; takeD. can; bring【答案】D【解析】could的疑问句的回答一般用can来回答,第二空是马上带来一些,用bring。
24.The volunteers __________ many signs to remind people to protect the environment.A.put upB. put outC. put awayD. put on【答案】A【解析】25.I remembered __________ the door before I left the office, but forgot to turn off the lights.A.lockingB. lockedC. to lockD. lock【答案】A【解析】我记得锁了门,记得做过某事,用remember doing sth.26.Doing your English homework isn’t ___________ difficult. You can finish it ___________ 7 p.m.A.this; afterB. that; byC. this; inD. that; after【答案】B【解析】否定句表示那么的用that,英语作业可以在七点之前完成,介词用by.27.--He never gets up late, ____________ he?--__________. He is always late for school.A.does; Yes, he does.B. doesn’t; Yes, he does.C. does; No, he doesn’tD. doesn’t; No, he does【答案】A【解析】反义疑问句的用法,前否后肯,never是否定副词,回答根据实际情况,后面说总是迟到,所以用肯定回答。
人教版七年级数学下学期第二次数学月考试卷【含答题卡】

人教版七年级数学下学期第二次数学月考试卷(总分:150分,考试时间:120分钟)一、精心选一选(每小题4分,共40分)1.下列方程中,是二元一次方程的是( )A. B.C. D . 02=-y x 21=-y x 12=-y x 01=-xy 2.“与3的和不大于6”用不等式表示为( )a A. B. C. D .63<+a 63≤+a 63>+a 63≥+a 3.若,则下列不等式不成立的是( )b a <A . B . C . D .11+<+b a b a 22<b a -<-33b a <4.已知单项式 与是同类项,那么的值分别是( )322y xm -m n y x -,m n A . B . C . D .⎩⎨⎧-==13n m ⎩⎨⎧==13n m ⎩⎨⎧=-=13n m ⎩⎨⎧-=-=13n m 5.若,则的值分别为( )0)3(12=--+-+y x y x y x ,A . B . C . D .⎩⎨⎧-==12y x ⎩⎨⎧==12y x ⎩⎨⎧==21y x ⎩⎨⎧==03y x 6.二元一次方程的正整数解有( )个72=+y x A .1 B .2 C .3 D .47.若关于的不等式的解集是,则的取值范围是( )x 1)1(->-a x a 1>x a A . B . C . D .0<a 0>a 1<a 1>a 8.不等式的非负整数解有( )个x x -≤-5)1(3A .1 B .2 C .3 D .49.小明准备用22元钱买笔和笔记本,已知每支笔3元,每本笔记本2元,他买了3本笔记本后,用剩余的钱来买笔,那么他最多可以买( )支笔A .3B .4C .5D .610.已知三年前,A 的年龄是B 的年龄的5倍,现在A 的年龄是B 的年龄的4倍,则A 现在的年龄是( ) 岁.A .48B .45C .12D .9二、认真填一填(每小题4分,共24分)11.把方程化为用含的代数式来表示:= .42=-y x x y y 12.写出一个解为的二元一次方程组: .⎩⎨⎧=-=21y x13.若关于的方程的解为负数,则的取值范围是 .x 23+=+x mx m 14.某次知识竞赛共有20题,每一题答对得10分,答错或不答都扣5分,小明得分要超过90分,他至少要答对 道题.15.在实数范围内定义新运算“△”,其规则是:△=a b ba -2已知不等式△的解集为,则 .x 1≥m 1-≥x =m 16.已知为整数且关于、的二元一次方程组有整数解,m x y ⎩⎨⎧=+=-7422y x my x 则= .m 三、耐心做一做(共86分)17.(12分)解方程组:(1) (2)⎩⎨⎧=--=533y x x y 233511x y x y +=⎧⎨-=⎩18.(8分)解不等式并在数轴上表示出其解集:63)2(2<-+x x 19.(8分)已知:且当时,;当时,;b kx y +=1-=x 2=y 2=x 7-=y 求:当时,的值;2-=x y 20.(8分)甲乙两人相距6千米,两人同时出发相向而行,1小时相遇;同时出发同向而行甲3小时可追上乙,两人的平均速度各是多少?21.(8分)当为何正整数时代数式的值不小于的值?x 41+x 1312--x 22.(8分)某物流公司要将300吨货物运往某地,现有A 、B 两种型号的车可供调用,已知A型车每辆可装20吨,B 型车每辆可装15吨,在每辆车不超载的条件下,把300吨货物一次性装运完,问:在已确定调用5辆A 型车的前提下至少还需调用B 型车多少辆?23.(10分)若关于、的二元一次方程组的解满足,x y ⎩⎨⎧=++=-my x m x y 52322>+y x 求的取值范围m 24.(10分)若关于、的二元一次方程组与有相同的解,x y ⎩⎨⎧=+=+822by ax y x ⎩⎨⎧-=-=-41023ay bx y x 求的值2017)2(b a +25.(14分)某商场销售A、B两种型号的计算器,A型的计算器进价为30元/台,B型的计算器进价为40元/台,商场销售3台A型的计算器和2台B型的计算器,可获利润68元;销售2台A型的计算器和3台B型的计算器,可获利润72元;(1)求A、B两种型号的计算器在该商场的售价分别是多少元/台?(2)某天商场只有2120元的进货资金,王经理又想购进这两种型号的计算器共70台,请问:①王经理有哪几种进货方案?②王经理怎样进货可使商场销售完这70台计算器获得的利润最大?最大利润为多少?并说明理由。
七年级上册英语第二次月考试卷及答案

七年级上册英语第二次月考试卷及答案七年级上册英语第二次月考试卷(温馨提示:考试时间90分钟,满分100分)一、完形填空(共10小题,每小题1分,共10分)先通读短文,掌握大意,然后从所给的A、B、C三个选项中选择可以填入空白处的最佳答案。
My name 1 Li Fen. I’m 2 . I get up 3 6:30 in the morning. I 4 to school from Monday to Friday. We 5 seven lessons every day. There 6 four lessons in the morning and three in the afternoon. School 7 at four o’clock in the afternoon. After class I often 8 games with my friends, then we 9 and 10 . It’s a busy day.( ) 1. A. am B. is C. are( ) 2. A. China B. England C. Chinese( ) 3. A. in B. on C. at( ) 4. A. go B. goes C. don’t go( ) 5. A. has B. have C. are( ) 6. A. is B. are C. have( ) 7. A. finishes B. finish C. starts( ) 8. A. do B. plays C. play( ) 9. A. goes home B. go home C. go to home( ) 10.A. have dinner B. have breakfast C. have the dinner二、阅读理解(共25小题,每小题2分,共50分)ADear Alan,It’s Monday, July 15. I’m really busy today. At 8: 00, I have Chinese.I don’t like Chinese. It’s boring. Then at 9: 00 I have maths. I like it very much because it’s very interesting. Next, at 10: 00, I have English. It’s my favourite subject. At 11: 00, I have music. I like it because it’s relaxing. I have lunch at 12: 25. After lunch, I have science. It’s fun. Then I have PE. I like it. It’s exciting. We can play football. After PE, we have history. It’s fun. Then I go home at 5: 00.Yours,Amy11. Amy doesn’t likebecause it’s boring.A. ChineseB. mathsC. musicD. history12. Amy hasclasses on Monday.A. threeB. fourC. sevenD. eight13. Amy’s favourite subject is.A. ChineseB. PEC. historyD. English14. Amy likes maths because it’s.A. relaxingB. BoringC. interestingD. exciting15. Amy doesn’t haveon Monday.A. musicB. artC. PED. EnglishBMike and Dick work in the same office. They don’t like the cold weather. One day they decided to take their holiday in Australia. Their plane arrived in Sydney at nine in the morning. They had a good rest in a hotel. The next morning they rented(租) a car in the city and began their trip.A few hours later the sun was shining in the sky and there were no shade trees beside the road. It was so hot that they could hardly(几乎不) go on driving. They had to stop to look around. Mike found a river was about half a kilometer away from them. They were both very happy and drove the car quickly. Soon they got to the river. Before they jumped into the river, Dick saw a boy playing under a big tree. He asked the boy, “Are there any sharks(鲨鱼)in the river? ”“No,” answered the boy, “There aren’t any. ”So they began to swim in the river. After a while, Dick felt something hit(敲打) against his leg. He told Mike about it. They were very afraid and stopped swimming. Dick asked the boy loudly, “Is it true that there are not any sharks in the river? ”“Yes, sir. There are a lot of crocodiles(鳄鱼)in the water. The sharks have all swum away.”16. Mike and Dick went to Australia _____.A. by carB. by airC. by shipD. we don’t know17. The two young men went to Australia to _____.A. swim in the riverB. study to driveC. go on a holidayD. find some work18. Mike and Dick couldn’t drive any more because _____.A. the sun was shining in the skyB. there were no shade trees beside the roadC. the weather was very hotD. they were too tired19. Dick became afraid because _____.A. he saw a shark in the waterB. he thought it might be a shark that hit his legC. he saw the boy laughing at them under the big treeD. he had been told there were some sharks in the river20. When the two young men heard(听到) the boy, they began to _____.A. catch the crocodiles in the waterB. look for the crocodiles thereC. run to beat the Australian boyD. come out of the river at once(立刻).CMark Twain was an American writer. He liked to tell funny stories, and he also liked to play jokes. One day, a friend of his lost his wallet and asked Twain to pay his train ticket for him.Twain said, "Im sorry, but it happens that I have very little money with me.I dont have enough money to buy two tickets."The friend was very sad."But," said Twain, "You can get on the train with me and, when the conductor comes through the train to collect (收) the tickets, you can hide under my seat." The friend agreed to this plan. But when the conductor came through the train, Twain gave him two tickets. One is for himself and the other is for his friend under the seat.Then in a loud voice, so that everyone in the train could hear him easily, Twain explained (解释), "My friend is a very strange man. When he rides on a train, he doesnt like to sit on the seat. He likes to lie on the floor under the seat."Of course, everybody then looked at the poor man under the seat and laughed at him.21. Who used to write funny short stories?A. Lu XunB. Mark TwainC. ShakespeareD. Luo Guanzhong22. Mark Twain was _________.A. a great German writerB. a great American writerC. a great English writerD. a great American lawyer23. ______ lay on the floor under the seat in stead of sitting on the seat.A. Mark TwainB. The conductorC. A strangerD. A friend of Mark Twains24. A friend asked Twain to buy train ticket for him because _________.A. he lost his walletB. he had very little money and could not pay the ticket.C. Twain owed his money, and then he wanted to get it back.D. he did not want to pay the ticket himself.25. Which of the following is right?A. Twain bought only one ticket for himself.B. Twain bought two tickets.C. Twain did not ask his friend to get on the train.D. Twain asked his friend to take his seat.DMy mother only has one eye. I hate her. I am always angry about it. She cooks dinner for students and teachers. One day at school, my mother sees me and says hello to me. I was so unhappy! How can she do this? I turn back and run away. The next day at school one of my classmates says, “Hey, your mother only has one eye!”I don’t know what to say. I wish my mother to just get away. I say to her at home, “If you’re only going to make others laugh at me, why don’t you just die (死)?” She doesn’t say a word.Many years later, I have my family in another city. Then one day, my mother comes to visit me. When she stands at the door, my children laugh at her. I shout, “GET AWAY! NOW!”“Oh, I’m so sorry. I have the wrong address (地址).”A few years later, she dies. Somebody gives me a letter from my mother. It reads:“My dearest son,I think of you all the time. I’m sorry that I should not go to your house and.... You see, when you are very young, you lose (失去) your eye in a car accident. As a mother, I give you mine. I am glad you can see a whole world for me with that eye.With all my love to you.Your mother.”( ) 26. Who does the writer’s mother work for?A. For his school.B. For his family.C. For his classmates.D. For his children.( ) 27. How does the writer feel when his classmate laughs at him?A. Happy.B. Unhappy.C. Sorry.D. Glad( ) 28. What does the mother do before she dies?A. She has an accident and loses her eye.B. She visits the writer and his children.C. She gives her eye to her son.D. She writes a letter and asks someone to give it to her son.( ) 29. What does the underlined word “accident” mean in Chinese?A. 故事B. 停车场C. 事故D. 车库( ) 30.How may the writer feel after he reads the letter?A. He still hates his mother because of her blind eye.B. He feels really sorry because he isn’t kind to her before she dies.C. He feels happy that he will never see the one-eyed woman.D. He is not sad at all, but very angry.EAutumn is a good season to do sports, because in summer it is too hot. But what you feel is quite different from what your body feels. Your body works more slowly, so it is easy for you to be hurt (伤害) when doing sports. Here is some advice (建议).Drink water. It is often very dry in autumn and your body loses (丢失) water easily. So it is good to drink 500 ml of water two hours before you exercise. But be careful you cannot drink water as soon as (一旦) you finish your exercise. Just do it about 15 minutes after that.Warm up your body. Before you do any sport, remember to do some warming-up activities such as walking or morning exercises to get your body ready for the sport.Have outdoor activities. It is cool outside your door and the air is much better. So outdoor activities like climbing hills, riding bikes and running or jogging are much fun. These can help you lose more fat, get you relaxed (放松) and help you work well.Do not eat too much after the sport. If you cannot control your mouth, it is better not to do any sport. You can have some fruit or vegetables if you really want to eat something.( )31.How many pieces of advice does the writer give?A. 5B. 4C. 7D. 6( ) 32.What must you remember to do before you do some exercise?A. Drink enough water and begin your sport.B. Eat a lot of food before your exercise.C. Climb the hills, ride your bike and run.D. Do some warming-up activities to get your body ready for the sport.( )33.What outdoor activity does this passage not mention (提及)?A. Walking.B. Jogging.C. Skating.D. Riding the bike.( )34. Who may give this advice to people?A.A doctor.B. A worker.C. A student.D. A farmer.( ) 35.Which can be the best title (标题) of this passage?A. Having Outdoor Activities.B. Advice on Doing SportsC. Autumn, My Favourite Season.D. Your Healthy Lifestyle.三、任务型阅读:(每题2分,共10分)Joe is twelve. He is a nice boy. He likes English and his English is very good. But he eats too much food. And he never plays sports. He hasa big breakfast every morning(每天早晨)。
初一数学第二次月考试卷

七 年 级 数 学 第 二 次 月 考 测 试 题 一、选择题(每题3分共30分) 1、 下列各数中,负数是 ( ) A —(—3) B —3- C (—3)2 D —(—3)3 2、单项式342h r π 的 ( ) A 系数是4, 次数是2 B 系数是3,次数是3 C 系数是34π,次数是3 D 系数是34,次数是4 3、在(—1)2,(—1)3,(—1)2007,(—1)2008中,值为1的有( ) A 1 个 B 2个 C 3个 D 4个 4、冬季某天我国三个城市的最高气温分别是—10 0C ,1 0C ,—7 0C 它们从高到低排列,正确的是( ) A —10 0C ,—7 0C ,1 0C B —7 0C , —10 0C ,1 0C C 1 0C ,—10 0C ,—7 0C D 1 0C , —7 0C , —10 0C 5、已知51=-a , 则a 的值为( ) A 6 B —4 C 6或—4 D —6或4 6、如图,数轴上A 、B 两点所表示的两数的( ) A 和为正数 B 积为正数 C 和为负数 D 积为负数 7、若-4a 2b 与3a m b n 是同类项,则( ) A m=2 n=0 B m=0 n=2 C m=2 n=1 D m=1 n=2 8、若a 2=(—2)2 则a 等于( ) A 2 B —2 C 4 D 2或—2 9某种细菌在培养过程中,每半小时分裂一次(由1个分裂为2个),那么这种细菌由1个分裂为32个要经过( ) A 2小时 B 3小时 C 2.5小时 D 5小时 10、有下列各组数:(1)—52与(—5)2 (2)—33与(—3)3 (3)—(—2)5与25 (4)0100与0200 (5)(—1)2008与(—1)2009其中相等的共有 ( ) A 1对 B 2对 C 3对 D 4对 二、填空题(每题3分共30分) 1、112-的相反数是________,112-的倒数是________ 112-的绝对值是________ 2、某天早晨气温为a 摄氏度,中午上升了b 摄氏度,晚上又下降了c 摄氏度,则晚上的气温是_____________摄氏度(上升记为+)。
七年级地理上册第二次月考试卷(带答案)

七年级地理上册第二次月考试卷(带答案)一、选择题(共14小题)读“大洲和大洋的分布图”,完成1-5题。
1.七大洲中,面积最小的是()A.南美洲B.南极洲C.欧洲D.大洋洲2.我们生活的大洲是()A.亚洲B.欧洲C.非洲D.北美洲3.四大洋中,面积最大的是()A.太平洋B.大西洋C.印度洋D.北冰洋4.从图中可以看出,世界海陆分布很不均匀。
陆地主要集中在()A.北半球、西半球B.北半球、东半球C.南半球、西半球D.南半球、东半球5.下列大洲中,被三大洋所环绕的是()A.北美洲B.南美洲C.非洲D.大洋洲读图完成6-7题6.大陆和它附属的岛屿合起来叫大洲,古巴国位于()A.欧洲B.北美洲C.南美洲D.大洋洲7.图中古巴国某点的经纬度正确的是()A.东经78°、北纬21° B.东经78°、南纬21°C.西经78°、南纬21 D.西经78°、北纬21°珊瑚礁是由造礁珊瑚和其他生物骨骼共同形成的生物质石灰岩,主要分布在热带浅水海域。
造礁珊瑚一般生活在距海面25米以内海域。
下图示意珊瑚礁发育的一种模式的不同阶段。
据此完成8-9题。
8.判断图示珊瑚礁的发育阶段依次是()A.②①④③B.③①④②C.②④①③D.③④①②9.图中所示④阶段珊瑚礁的形成过程中,海平面可能()A.先升后降B.先降后升C.持续上升D.持续下降生物学家密卡尔逊在19世纪末调查地球上蚯蚓的分布情况时,发现了一个非常奇怪的现象:有一种正蚯蚓(一种蚯蚓的名称)同时分布在图中同纬度的甲、乙两地,但与甲地同纬度同大陆的西海岸却并没有这种蚯蚓分布。
读图,完成10-12题。
10.甲、乙两地之间的大洋是()A.大西洋B.太平洋C.印度洋D.北冰洋11.与甲地同纬度同大陆的西海岸多火山、地震,原因是()A.位于板块张裂拉伸地带B.位于板块俯冲碰撞地带C.位于板块断裂错动地带D.大型工程建设12.正蚯蚓的分布现象最合理的解释是()A.蚯蚓能越洋B.蚯蚓不能穿越陆地C.大陆漂移D.蚯蚓分布范围窄2020.5.27,中国高程测量登山队成功登顶世界最高峰一珠穆朗玛峰。
七年级上册第二次月考试卷【含答案】

七年级上册第二次月考试卷【含答案】专业课原理概述部分一、选择题(每题1分,共5分)1. 下列哪个是生态系统中的生产者?A. 植物B. 动物C. 细菌D. 岩石2. 光合作用的主要场所是?A. 叶绿体B. 细胞核C. 线粒体D. 细胞膜3. 下列哪种物质是植物光合作用的产物?A. 二氧化碳B. 氧气C. 有机物D. 水4. 下列哪种动物属于变温动物?A. 鸟类B. 哺乳类C. 爬行类D. 鱼类5. 下列哪种物质是植物呼吸作用的产物?A. 二氧化碳B. 氧气C. 有机物D. 水二、判断题(每题1分,共5分)1. 植物进行光合作用时,必须有光的存在。
()2. 动物细胞和植物细胞都有细胞核。
()3. 生态系统中的消费者只有动物。
()4. 细菌和真菌都是生态系统中的分解者。
()5. 植物进行呼吸作用时,需要氧气的参与。
()三、填空题(每题1分,共5分)1. 生态系统由生产者、消费者和______组成。
2. 植物细胞和动物细胞的共同结构有细胞膜、细胞质和______。
3. 光合作用的公式是:二氧化碳+水+光能→有机物+______。
4. 呼吸作用的公式是:有机物+氧气→二氧化碳+水+______。
5. 下列物质中,属于有机物的是______。
四、简答题(每题2分,共10分)1. 简述生态系统的组成。
2. 简述光合作用的意义。
3. 简述呼吸作用的意义。
4. 简述植物细胞和动物细胞的区别。
5. 简述变温动物和恒温动物的区别。
五、应用题(每题2分,共10分)1. 某生态系统中,植物通过光合作用产生的有机物为1000克,其中500克被初级消费者食用,请问初级消费者能获得多少克的能量?2. 某种植物在光合作用过程中,每吸收10克二氧化碳,可以释放8克氧气,若该植物吸收了100克二氧化碳,请问可以释放多少克氧气?3. 某种动物在呼吸作用过程中,每消耗10克有机物,可以产生6克二氧化碳,若该动物消耗了50克有机物,请问可以产生多少克二氧化碳?4. 某种植物在光合作用过程中,每吸收10克水,可以产生6克葡萄糖,若该植物吸收了100克水,请问可以产生多少克葡萄糖?5. 某种动物在呼吸作用过程中,每消耗10克有机物,可以产生4克水,若该动物消耗了50克有机物,请问可以产生多少克水?六、分析题(每题5分,共10分)1. 分析光合作用和呼吸作用的相互关系。
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七年级数学第二次月考试卷
学校: 班级: 姓名: 座位号
一、选择题(本大题6小题,每小题3分,共18分)在每小题列出的四个选项中,
只有一个是正确的,请把正确的答案填写在括号内. 1、下列方程为一元一次方程的是( )
A. x x =-95
B. 32-=x y
C. 536=-x
D. 012=-x
2.下列各式子中运算错误的是( )
A.523x x x -=
B.550mn nm -=
C.22451x y xy -=-
D.22232x x x -= 3、下列说法正确的是( )
A. 若b a =,则b c c a -=-
B. 若2
2b a =,则b a =
C. 若b a =,则
c b c a =
D. 若
c b
c a =,则b a = 4、下列各对数中,数值相等的是( )
A .32与2
3 B 、 32-与3)2(- C 、 23-与2)3(- D 、 223⨯和2)23(⨯ 5、一张试卷上有25道选择题:对一道题得4分,错一道得-1分,不做得-1分,某同学做完全部25题得70分,那么它做对题数为( ) A .17 B .18 C .19 D .20
6、一件工作,甲单独做20小时完成,乙单独做12小时完成,现由甲独做4小时,
剩下的甲、乙合做,还需几小时?设剩下部分要x 小时完成,下列方程正确的是( )
44.1.1202012
202012
44.1.1202012
202012
x x
x x A B x x x x C D =
--=
+-=++
=-+
二、填空题(本大题8小题,每小题3分,共24分)请将下列各题的正确答案填写在相应的位置上.
7、若()511||=--m x m 是一元一次方程,则m= 8、方程6x+5=3x 的解是________.
9、惠州市出租车的收费标准是:3千米内(含3千米)起步价为8元,3千米外每千米收费为1.8元,当你回家付出车费20.6元,设你坐出租车x 千米?根据题意列方程 。
10、当m 值为______时,
45
3
m -的值为0. 11、如果x=5是方程ax+1=10-4a 的解,那么a=______
12、已知代数式24x x -的值是3,则代数式2282007x x -+的值是 。
13、一个两位数,十位数字是9,个位数比十位数字小a ,则该两位数为_______.
14.观察下列图形的排列规律(其中▲、■、★分别表示三角形、正方形、五角星).若
第一个图形是三角形,则第18个图形是 .(填图形的名称) ▲■★■▲★▲■★■▲★▲…
三、解下列方程(本大题4小题,每小题6分,共24分)
15.(1) x + 2 = 4x - 7 16. 2(x -1)-3(4- x )=6
17、(6分)若关于x 的方程2x-3=1和2
x k
-=k-3x 有相同的解,求k 的值.
18、先化简,再求值(6分)
y 4x xy)y 3(x xy)y 2(x 222---+ 其中x=-2, y=-1
四、列方程解应用题(本大题3小题,每小题8分,共24分)
19、. 甲、乙两站间的路程为450千米,一列慢车从甲站开出,每小时行驶65千米;一列快车从乙站开出,每小时行驶85千米,两列火车同时开出,相向而行,经过多少小时相遇?
20、 红光服装厂要生产一批某种型号的学生服,已知每3米布料可做上衣2件或裤子3条,计划用600米布料生产学生服,应该分别用多少米布料生产上衣或裤子恰好配套?(一件上衣配一条裤子)
21、某校八年级近期实行小班教学,若每间教室安排20名学生,则缺少3•间教室;
若每间教室安排24名学生,则空出一间教室.问这所学校共有教室多少间?
五、解答题(本大题2小题,每小题9分,共18分)
23.中国移动四川分公司开设适合普通用户的两种通讯业务分别是:
“天山通”用户先缴25元月租,然后每分钟通话费用0.2元;
“神州行”用户不用缴纳月租费,每分钟通话0.4元。
(1) 设一个月内通话时间约为x 分钟,这两种用户每月需缴的费用是多少元?(用
含x 的式子表示)
(2) 一个月内通话多少分钟,两种移动通讯方式费用相同?
(3) 若李老师一个月通话约80分钟,请你给他提个建议,应选择哪种移动通讯
方式合算一些?请说明理由。
六、(本大题共一个小题,共12分) 24.观察下列等式
111122=-⨯,1112323=-⨯,111
3434
=-⨯, 将以上三个等式两边分别相加得:
1111111113
111223342233444
++=-+-+-=-=⨯⨯⨯. (1)猜想并写出:
_____
____________________)
1(1
=
+n n
(2)直接写出下列各式的计算结果:
①
111112233420122013
+++∙∙∙+=⨯⨯⨯⨯ ②
1111
122334(1)
n n +++∙∙∙+=⨯⨯⨯⨯+ (3)探究并计算: 1111
24466820102012
+++∙∙∙+⨯⨯⨯⨯。