2015全年错题集
高中数学错题集及解析

高中数学错题集及解析1. 题目:如图所示,已知AD∥CF,DE∥CF,∠ADE=40°,∠FCD=120°,求∠BCF的度数。
A B C DE F解析:根据题目所给的已知条件,我们可以得到如下信息:AD∥CF,DE∥CF,∠ADE=40°,∠FCD=120°。
要求∠BCF的度数,我们可以利用几何知识进行推理和计算。
首先,根据平行线的性质,我们知道∠ADE=∠FCD=40°。
由于∠FCD=120°,所以∠DCF=180°-120°=60°。
接下来,我们观察四边形ADCF,可以发现∠CAF和∠ADF是对顶角,因此它们的度数相等。
∠ADE和∠DCF是共顶角,它们的度数也相等。
由此,我们可以得到以下等式:∠CAF=∠ADF=40°∠ADE=∠DCF=60°现在我们来考虑三角形BCF。
已知∠CAF=∠ADF=40°,∠BCF为所求。
我们知道,三角形内角和为180°,因此有:∠CAF+∠ADF+∠BCF=180°带入已知信息,得到:40°+40°+∠BCF=180°化简得:80°+∠BCF=180°再进一步,我们可以得到:∠BCF=180°-80°∠BCF=100°因此,∠BCF的度数为100°。
2. 题目:已知函数f(x)=2x^3-3x^2+x-5,求f(-1)和f(2)的值。
解析:我们可以使用给定的函数,将x的值代入函数中进行计算,从而得到f(x)的值。
首先,计算f(-1)的值。
将x=-1代入函数f(x)中,有:f(-1)=2(-1)^3-3(-1)^2+(-1)-5化简得:f(-1)=-2-3+(-1)-5=-2-3-1-5=-11因此,f(-1)的值为-11。
接下来,计算f(2)的值。
最新苏教版)2015年五年级数学下册期末复习典型易错题专项讲义

最新苏教版)2015年五年级数学下册期末复习典型易错题专项讲义典型错题1一根5米长的铁丝要平均分成6段,每段的长度是多少?每段长度是5÷6=0.83米,每段长度是这根铁丝的1/6.1.一根1米长的钢管要平均分成3段,每段占全长的多少?每段占1/3,每段长度是1÷3=0.33米。
2.三块饼要平均分给四个孩子,每个孩子分得几块饼?每个孩子分得3/4块饼,每个孩子分得的是这些饼的1/4.3.一块2公顷的菜地要平均分成8份,其中3份是多少公顷?每份是2/8=0.25公顷,3份共0.75公顷。
4.___用29分钟走了2千米路,平均每分钟行多少千米?每分钟行2÷29≈0.07千米,每分钟行的占总路程的1/29.典型错题2一根5米长的钢筋要平均分成9段,每段的长度是多少?每段长度是5÷9≈0.56米。
1.一根3米长的彩带要平均分给7个小朋友,每个小朋友分到多少米?每个小朋友分到3÷7≈0.43米,每人分到总数的1/7.2.___用15分钟走了500米路,平均每分钟行多少米?每分钟行500÷15≈33.33米,每分钟行的路程是全程的1/15.典型错题35公顷土地要平均分成3天耕完,每天耕地多少公顷?每天耕地5÷3≈1.67公顷,每天耕这片土地的1/3.1.一根2米长的绳子要平均剪成8段,每段的长度是多少米?每段长度是2÷8=0.25米,每段是1米的1/4,每段是这根绳子的1/8.2.___做语数英三课家庭作业要2小时,做数学用了1小时,做英语用了0.5小时,做语文用了0.75小时,做了多长时间?___共用了2.25小时。
3.___做语数英三课家庭作业要2小时,做数学用了全部时间的1/3,做英语用了全部时间的1/6,做语文用了全部时间的3/8,做了多长时间?___共用了2.25小时。
典型错题4一根绳子,第一次截去2米,第二次截去剩下的长度的1/3,第二次截去的比第一次截去的多。
错题集

高三四班错题集1.These remarkable findings suggest the elephants have ______ a memory capacity to makedistinctions between human voices.A.built upB. packed upC. brought upD. took up2.______ people have become masters of their own country that science can really sever thepeople.A.Only whenB. If onlyC. Only ifD. it is only when3.For Western readers, one of the pleasures of reading Liu Cixin, the author of ―The Three BodyProblem,‖ is that his stories _______ entirely different resources.A.draw onB. put onC. rely onD. take on4.Sligo is an ancient and lively enough center , overlooked by its church and ____ with pubs.A.rangB. ringingC. ringedD. rung5.The door was open, from____ he could see everything outside.A.whichB. after whichC. behind itD. where6.____ both sides accept the agreement____ a lasting peace be established in this region.A.Only if; willB. If only; wouldC. Should; willD. Unless; would7.The student _______ all the teachers took great pride was admitted into Hong KongUniversity last year.A.to whomB. of whomC. in whomD. on whom8.The spokesman was seated in front of all the journalists at the press conference, _______ toanswer all kinds of questions.A.preparedB. preparingC. to be preparedD. having prepared9. He is shinier than when last we met but _____ is unchanged.A.meanwhileB. alsoC. generallyD. otherwise10. Such a passionate speech _____ at the school opening ceremony that we were deeply movedand strongly inspired.A.did he madeB. he madeC. had he madeD. he had made11.---Why is it that it rains all the time in England?---________.You’ll soon become accustomed to it.A.You said itB. Don’t worryC. It’s nothingD. So-so12. Tu youyou was awarded the 2015 Nobel Prize in Physiology or Medicine, but before that noone could have imagined how great a role she _____ in the medicine field.A.has playedB. had playedC. is playingD. was to play13. ―How could you lose so much money?‖ Charlie asked his wife, eyeing her angrilyfrom_________the kitchen table.A.atB.acrossC.throughD.on14..It is common_______ that a certain amount of regular exercises improves the health whether or not exercise adds to the length of life.A.evidenceB. experienceC. practiceD. ignorance15.When evening came, I stood at the beach admiring the silver ____ of moonlight on the ocean.A.lightB. shadowC. colorD. play16.Where were you during the night ____________ ?A.in discussionB. In questionC. In talkD. In doubt17.The result is not very important to us , but if we do win, then so much _________.A.the betterB. bestC. betterD. conventional18. I’m afraid I can’t attend your party this evening , _________ I’d like to.A.much asB. as muchC. so muchD. so eagerly19.—Did you attend the meeting for the experiment project yesterday?—Yes, but I don’t think I ______ because my director was there.A.need have B. needed to C. need to have D. need to20.The film The Man from MacaoⅡhas____ more than 889 million yuan since it opened on Feb.19 during the Spring Festival.A.pull inB. brought outC. appealed toD. picked up21.Though Tom was physically challenged, he did not ___himself to his fate.A.resistB.reserveC.resignD.rescue22.A new eight-kilometer road is under construction____ links the port area with motorway system.A.whereB.asC.so thatD.that23.Jack is good, hard-working and intelligent. _____,I can’t speak too highly of him.A.As a resultB.In a wordC.In other wordsD. Above all24.____news hit ___Vience Film Festival unexpectedly :Hayao Miyazaki, the world’s most honored creator of animated features, was ending his movie career.A./;theB. /;/C. The;/D. The;the25.China made a commitment to the world in the Copenhagen Summit that by 2020,the carbon-intensity of its economy _______ tall 40% to 45%.A.shallB. mayC. mustD. should26._______________,a man who expresses himself effectively is sure to succeed more rapidly than a man whose command of language is poor.A.Other things being equalB. Were other things equalC. To be equal to other thingsD. Other things to be equal27. -----Do you know what he did all day while he was in college?----He spent as much time playing as he ______________.A.s tudyingB. was studyingC. studiedD. did studying28.Most teachers recognize that teaching is______.A.a n art as much it is a scienceB. as an art as much it is scienceC. as much an art as it is a scienceD. much an art as it is a science29.Not only ________the jewelry she ______been sold for her son’s gambling debts but also her house.A.i s;hasB.has;hadC.has;hasD.不填;has30.All of Beijing’s highways, including the airport expressways, will give free ______ to small passenger cars during one of the longest-ever eight-day National Day holidays.A.a ccessB. pathC. roadD. passage31.To my surprise, the manager ______ 30 dollars from my salary without any good reason.A.cut offB.kept backC.brought downD.hold up32.----You wanted to leave early and Jack wanted to leave late?----Yes, but we split the_____ and left at noon.A.differenceB. relationC. contradictionD. principle33.It’s near four years since I worked in that firm. I______a band with other fellows.A.operated B .had been operating C. operating D. am operating34. She managed to save she could out of her wages to help her brother.A.how little moneyB. so little moneyC. such little moneyD. what little money35.It would be a good idea to use a plastic bottle, cut off, as a container to grow young plants in.A.of which the topB. the top isC. the top of thatD. with its top36.-----Do you think he would have given you a hand in your time of financial difficulty?----He ____had he known about it. After all,we are good friends.A.wouldn’t haveB.should haveC. couldn’t haveD.must have37. It’s generally believed that the popular South Korean drama Man From the Stars is __ in creative storylines as in pretty faces and fashion.A. such a successful exampleB. so successful an exampleC. as a successful exampleD. as successful an example38. People are ________ the use of alternative energy sources because the rate ________ we are now assuming fuels like gas and oil is shocking and they may run out one day.A. wrestling with; by whichB. pushing for; at whichC. catching up on; at whichD. accounting for; on which39. Economic growth in the world remains weak throughout 2012 and it is hoped that it will_____ gradually in 2013.A.break upB. make upC. pick upD. rise up40. the children of our village ____________until the repairs of the destroyed bridge have been made.A.have takenB.takeC.tookD.are taking41.We can gain valuable wisdom from mistakes which ___ to prevent them from happening again.A.should be avoidedB. might be avoidedC. must have been avoidedD. could have been avoided42. ---- I ______ imagine it will take about two hours to have your pictures developed.-----All right. I’ll come to get them by then.A.shouldB. mustC. canD. would43. ----- I’d like to have one more look around. By myself this time.----________.A.Be my guestB. Drop me a lineC. Count me outD. Allow me44. She had almost reached her destination when a delicious smell ______ her progress and she stopped.A deletedB scratchedC arrestedD faded45 ——Will our flight to Paris be delayed ?——It ____ . The flights of this airline are usually very punctual, unless there is bad weather.A mustn’tB can’tC shouldn’tD needn’t46 The Second World War, _____ the earlier one in 1914, promoted public concern about the physical and intellectual well-being of the country’s human resources.A so wereB so didC as didD as were47.The film The Man from MacaoⅡhas____ more than 889 million yuan since it opened on Feb.19 during the Spring Festival.A.pull inB. brought outC. appealed toD. picked up48.Do you think he would have given you a hand in your time of financial difficulty?—He ____had he known about it. After all,we are good friends.A.wouldn’t haveB.should haveC. couldn’t haveD.must have49.The student _______ all the teachers took great pride was admitted into Hong Kong University last year.A.to whomB. of whomC. in whomD. on whom50. At first, the company _____ many fine promises to Jack in order to get him to work for them.A.held upB. held backC. held offD. held out51. He advised farmers to choose the best seed-heads, _____ that had the best color.A.thoseB. onesC. itD. one52.Though ___behind and feeling awkward, Jack kept on running until he reached the finishing line.A.leavingB.having leftC.leftD.being left53.Though Tom was physically challenged, he did not ___himself to his fate.A.resistB.reserveC.resignD.rescue54.Peotry written from the _________ of the urban youth tends to reveal their anxiety over a lack of sense of belonging.A.perspectiveB. priorityC. participationD. privilege55.Whai’s the ______ of having a public open space where you can’t eat, drink or even simply hang out for a while .A.senseB. matterC. caseD. opinion56.We have strong _______ for believing that the mine accident in Heilongjiang was due to the poor management.A grounds B. reason C. cause D. purpose57.—Isn’t it surprising to meet Grace at the conference?—Yes. I really didn’t think she _______here.A.has beenB. had beenC. would beD. would have been58.Despite her recent surgery she has been carrying on ______.A.consequentlyB. otherwiseC. likewiseD. regardless59.—Your car would be ready next Tuesday.—We were _______ hoping you’d be able to do it by this Friday..A.stillB. ratherC. alwaysD. even60. We work during the week, but weekends are usually ______.A.vacantB. casualC. emptyD. clear61. All applications must be ____ to the personnel department by Monday.A.cateredB. subscribedC. contributedD. submitted62. With the night falling, the crowd gathering around the accident scene began to ____ .A.break upB. break downC. break outD. break away63. Obviously, many wines have improved, or are expected to improve _______age, and it is the case______friendship.A.with; withB. to; overC. alongside; inD. for; of64. Men are equally as good as women at taking care of the others. Better _______ , male nurses can be a great help in keeping patients still when they are receiving painful treatment.A.yetB. muchC. enoughD. even65.How about your new business?We’re drawing up our plans experiences of other factories.A.in the case ofB. in the light ofC. in the event ofD. in the wake of66.The ide a ―happiness‖,,will not stand for easy definition.A.to be rigidB. to be sureC. to be fairD. to be perfect67.The G20 Summit in Hangzhou ,the world economy is certain to go through a little strongrecovery.A.being held successfullyB. to be held successfullyC. having held successfullyD. held successfully68.Shanghai has climbed up the cost–of–living ladder to No.21 on _____the world’s most expensive city list,overtaking New York for the first time,according to______global cost–of–living survey.A.the;theB.a;aC./;theD.the;a69.It was not until dark ______ he found ______ he thought was the correct way to solve the problem.A.that; what B.that; that C.when;what D.when;that70.—I’d like to learn more about the Doha Asian Games.—Better try ______ the CCTV website, and you are likely ______ the information in no time.A.to visit; to getB. to visit; gettingC. visiting; to getD. visiting; getting71.If the project should be delayed for a day, ______would means we would be fined $100,000.A.thatB. asC. whichD. and it72.I have realized the truth from my life story that ______ suffering kills you, it makes you stronger.A.thoughB. beforeC. ifD. unless73.The Sri lanka government troops have____control over the rebellions area and killed their leader.A.BroughtB. exercisedC. declinedD. developed74.The press conference was ______ when the president was attacked.A.cut downB. cut outC. cut offD. cut short75. ---What should I wear to attend the wedding party?---Dress _______ you like.A. whatB. howC. whateverD. however76. In Alice Munro’s novel,Carla,trapped in a bad marriage,____, decides to flee.A.her unhappiness being built into desperationB.her unhappiness has built into desperationC.her unhappiness builds into desperationD.her unhappiness building into desperation。
小学六年级数学错题集毕业复习资料

小学六年级数学错题集毕业复习资料小学毕业总复习是对学生全面而系统地巩固整个小学阶段所学的数学基础知识和基本技能,提高知识的掌握水平,进一步发展能力。
下面是店铺整理的关于小学六年级的数学错题集毕业复习资料,供大家参阅,希望对您的教育教学有帮助!小学六年级数学错题集毕业复习资料1一、填空1、一个三角形的底角都是45度,它的顶角是( )度,这个三角形叫做( )三角形。
2、有一根20厘米长的铁丝,用它围成一个对边都是4厘米的四边形,这个四边形可能是( )。
3、一项工程,甲乙两队合作20天完成,已知甲乙两队的工作效率之比为4:5,甲队单独完成这项工程需要( )天。
4、一座钟的时针长3厘米,它的尖端在一昼夜里走过的路程是( )厘米。
5、在一块长10分米,宽6分米的长方形铁板上,最多能截取( )个直径是2分米的圆形铁板。
6、3/4吨可以看作3吨的( / ),也可以看作9吨的( / )。
7、两个正方体的棱长比为1∶3,这两个正方体的表面积比是( )∶( ),体积比是( )∶( )。
8、长方体货仓长50米,宽30米,高5米,这个长方体货仓最多可容纳8立方米的正方体货箱( )个。
9、棱长1厘米的小正方体至少需要( )个拼成一个较大的正方体,需要( )个可以拼成一个棱长1分米的大正方体。
如果把这些小正方体依次排成一排,可以排成( )米。
10、一个数的20%是100,这个数的3/5是( )。
11、六(1)班今天出勤48人,有2人因病请假,这天的出勤率是( )%。
12、A除B的商是2,则A∶B=( )∶( )。
13、甲数的5/8等于乙数的5/12,甲数∶乙数=( )∶( )。
14、把4∶15的前项加上2.4,为了要使所得的比值不变,比的后项应加上( )。
15、6/5吨:350千克,化简后的比是( ),比值是( )。
16、把甲班人数的1/8调入乙班后两班人数相等,原来甲、乙两班人数比是( )。
17、甲走的路程是乙的4/5,乙用的时间是甲的4/5,甲、乙速度比是( )。
六年级错题集(小作者整理)

错题集错题集1、 一根绳子3折量一口井,佘出1/3米;如果4折去量又不足1/4,求绳长,井深各多少米?,求绳长,井深各多少米?2、 小冬的爷爷参加运动会登山比赛,小冬的爷爷参加运动会登山比赛,上山时平均每分钟走上山时平均每分钟走30米,15分钟到山顶,分钟到山顶,然后用然后用20分钟沿原路下山,问上山、下山平均每分钟走多少米?路下山,问上山、下山平均每分钟走多少米?3、 一袋大米已吃了的和剩下的比是5:3,已经吃了这袋大米的,已经吃了这袋大米的 ( )) 剩下的比吃了的少(剩下的比吃了的少( )%。
( )4、 有一个圆柱形水池,用一根长5米的竹竿竖直地插入水池中,在竹竿与水面的交接处标上记号A ,然后将竹竿倒过来,依照上述方法,再做记号B ,记号A 和B 之间的距离是竹竿长度的1/5,那么水池中水深多少米?水池中水深多少米?5、有两个完全相同的长方体恰好拼成一个正方体,有两个完全相同的长方体恰好拼成一个正方体,正方体的表面和是正方体的表面和是30平方厘米。
如果把这两个长方体改拼成一个大长方体,那么大长方体的表面积是(体改拼成一个大长方体,那么大长方体的表面积是( )平方厘米)平方厘米6、有一花坛,高0。
5米,底面是边长2.4米的正方形。
四周用砖砌成,厚度是0。
2米,中间填满土。
(1)花坛所占的空间有多大?(2)花坛里大约有多少立方米土?)花坛里大约有多少立方米土?7、小明看一本科普书,已看了全书的3/8,比余下的少36页,这本书一共多少页?页,这本书一共多少页?8、食堂有3吨大米,如果每天吃去1/14,( )天可以吃完。
)天可以吃完。
9、水结成冰后体积增加了1/9,冰融化成水后,体积减少(,冰融化成水后,体积减少( )10、体积是1立方米的正方体,可以截成(立方米的正方体,可以截成( )个棱长是1分米的正方体,这些正方体排成一行,成为一个长方体,这个长方体的长是(为一个长方体,这个长方体的长是( )11、一个长方体长16厘米,如果把它的长增加2厘米,那么表面积就增加30平方厘米。
2019-2020年新湘教版初中数学七年级上册七年级上学期错题集.doc

2015年秋季学期错题集1下表中有两种移动电话计费方式:请思考并完成下列问题:(1)设一个月内移动电话主叫tin(t是正整数),根据上表,列表说明:当t在不同时间范围内取值时,按方式一和方式二如何计费?(2)观察你的列表,你能从中发现如何根据主叫时间选择省钱的计费方式吗?通过计算验证你的看法。
2 已知|a|=3,|b|=2,且a<b,则a+b=______.3 已知:|-2|与|y-5|互为相反数,求和y的值。
4 根据下面给出的数轴,解答下面的问题:⑴请你根据图中A、B两点的位置,分别写出它们所表示的有理数A: B:;⑵观察数轴,与点A的距离为4的点表示的数是:;⑶若将数轴折叠,使得A点与-2表示的点重合,则B点与数表示的点重合;⑷若数轴上M、N两点之间的距离为2010(M在N的左侧),且M、N两点经过(3)中折叠后互相重合,则M、N两点表示的数分别是:M N .5求|-3|+|+4|的最小值,并说明此时有理数的取值范围。
6 知识链接:对于关于的方程a=b,(a、b为常数)⑴当a≠0时,此方程是一元一次方程,方程有唯一解=b/a;⑵当a=0,b≠0时,没有任何实数能满足方程使等式成立,此时,我们说方程无解;⑶当a=0,b=0时,所有实数都能使方程成立,也就是说方程的解为全体实数,所以我们说方程有无数个解。
问题解决:⑴解关于的方程:(-1)=2⑵解关于的方程:-4=2+n7 (2011•宜昌)随着经济的发展,尹进所在的公司每年都在元月一次性的提高员工当年的月工资.尹进2008年的月工资为2000元,在2010年时他的月工资增加到2420元,他2011年的月工资按2008到2010年的月工资的平均增长率继续增长.(1)尹进2011年的月工资为多少?(2)尹进看了甲、乙两种工具书的单价,认为用自己2011年6月份的月工资刚好购买若干本甲种工具书和一些乙种工具书,当他拿着选定的这些工具书去付书款时,发现自己计算书款时把这两种工具书的单价弄对换了,故实际付款比2011年6月份的月工资少了242元,于是他用这242元又购买了甲、乙两种工具书各一本,并把购买的这两种工具书全部捐献给西部山区的学校.请问,尹进总共捐献了多少本工具书?8如图M是线段AB上一点且AB=10cD两点分别从MB同时出发时1c/s3c/s的速度沿直线BA向左运动(1)当点D运动了2s求这时A+MD的值.(2)若点D运动时总有MD=3A求AM的长.9 如图,数轴上有A、B、、D四个点,分别对应的数为a、b、c、d,且满足a,b是方程|+9|=1的两根(a<b),(c-16)²与|d-20|互为相反数,(1)求a、b、c、d的值;(2)若A、B两点以6个单位长度/秒的速度向右匀速运动,同时、D两点保持不动,并设运动时间为t秒,问t为多少时,A、B两点都运动在线段D上(不与、D两个端点重合)(3)若A、B两点以6个单位长度/秒的速度向右匀速运动,同时、D两点以2个单位长度/秒向左匀速运动,并设运动时间为t秒,问t为多少时,A、B两点都运动在线段D上(不与、D两个端点重合)?10 如图,动点A从原点出发向数轴负方向运动,同时动点B也从原点出发向数轴正方向运动,2秒后,两点相距16个单位长度.已知动点A、B的速度比为1∶3(速度单位:1个单位长度/秒).(1)求两个动点运动的速度;(2)在数轴上标出A、B两点从原点出发运动2秒时的位置;(3)若表示数0的点记为O,A、B两点分别从(2)中标出的位置同时向数轴负方向运动,再经过多长时间,满足OB=2OA?11 小明想在两种灯中选购一种,其中一种是10瓦的节能灯,售价32元;另一种是40瓦的白炽灯,售价为2元.两种灯的照明效果一样,使用寿命也相同.如果电费是05元/每千瓦时.你选择购买哪一种灯?12 已知一铁路桥长1000米,现有一列火车从桥上通过,测得火车从开始上桥到车身过完桥共用1分钟,整列火车完全在桥上的时间为40秒,求火车的速度及火车的长度。
2014-2015 北师大版生物八上 错题集
八年级生物上册错题集姓名班级学号得分一、选择题(每题只有一个最佳答案,2ⅹ45=90分)题号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 答案题号16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 答案题号31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 答案1.鸟类的运动器官是A.羽毛和翼B.羽毛和足C.足和翼D.翼和胸肌2.质地致密坚硬的骨质大部分位于A.长骨的两端B.长骨骨干的中央C.长骨骨干的周围D.短骨和扁骨中3.以下哪项不属于...中轴骨A.脊柱B.肩胛骨C.胸骨D.肋骨4.关于动物运动的相关知识,下列正确的是A.所有动物体内都有骨骼B.骨的运动要靠骨骼肌的牵拉C.动物的运动仅靠运动系统来完成D.骨骼肌包括中间的肌腱和两端的肌腹两部分5.王明同学的身高早上时有157厘米,晚上却变成155厘米,原因是A.椎间盘有弹性B.脊椎有生理弯曲C.骨骼肌收缩D.骨干缩短6.关节在运动中起的作用是A.联系B.支点C.支持D.杠杆7.一段时间后,小鸟对立在田间的稻草人不再警惕和害怕,这种行为是A.印随学习B.习惯化C.防御行为D.攻击行为8.人体运动系统的组成包括A.骨、关节和骨骼肌B.骨、骨连结和骨骼C.骨、骨连结和骨骼肌D.骨、骨质和骨骼肌9.生物物种的灭绝是A.人类破坏的结果B.一个漫长的自然过程C.随着人类活动逐渐出现的现象D.随着环保的发展将逐渐消失的现象10.对珍稀动物进行易地保护的最根本目的是A.恢复野生种群B.宣传教育C.创造新物种D.繁殖管理11.下列哪些生物属于生态系统的生产者A.蘑菇B.蓝藻C.炭疽杆菌D.枯草杆菌12.关于右图所示的生物,下列说法正确的是A.它能产生黄曲霉素B.它能产生青霉素C.它是一种放线菌D.它是一种病毒13.在“探究我们身边是否存在微生物”的实验中,实验过程包括①配制培养基;②在适宜的温度下培养;③接种;④高温灭菌;⑤观察结果。
高中语文错题集09 小说文本阅读之次要人物作用题(解析版)
易错题09 小说文本阅读之次要人物作用题——将次要人物当主要人物分析目录01 易错题简介易错题型——小说文本阅读之次要人物作用题易错原因——没有找到分析人物作用的角度02 易错题例析03 易错题攻略【攻略一】从“牵线搭桥推动情节”角度看。
【攻略二】从“侧面衬托主要人物”角度看。
【攻略三】从“渲染气氛奠定基调”角度看。
【攻略四】从“升华主题画龙点睛”角度看。
04 易错题练习★易错题型——小说文本阅读之次要人物作用题人物形象的作用包括主要人物形象作用、次要人物形象作用。
次要人物分析题,有时候更成为考试考查的重点。
与主要人物相比,次要人物作用更多的是穿针引线、烘托主要人物。
★易错原因——1.未找到分析次要人物作用的角度。
2.将次要人物当主要人物分析。
1.(2015浙江高考卷)阅读下列文字,完成后面的练习。
捡烂纸的老头汪曾祺烤肉刘早就不卖烤肉了,不过虎坊桥一带的人都还叫它烤肉刘。
这是一家平民化的回民馆子,地方不小,东西实惠,卖大锅菜。
炒辣豆腐,炒豆角,炒蒜苗,炒洋白菜。
比较贵一点是黄焖羊肉,也就是块儿来钱一小碗,在后面做得了,用脸盆端出来,倒在几个深深的铁罐里,下面用微火煨着,倒总是温和的。
有时也卖小勺炒菜:大葱炮羊肉,干炸丸子,它似蜜……主食有米饭、馒头、芝麻烧饼、罗丝转;卖面条,浇炸酱、浇卤。
夏天卖麻酱面。
卖馅儿饼。
烙饼的炉紧贴着门脸儿,一进门就听到饼铛里的油吱吱喳喳地响,饼香扑鼻,很诱人。
烤肉刘的买卖不错,一到饭口,尤其是中午,人总是满的。
附近有几个小工厂,厂里没有食堂,烤肉刘就是他们的食堂。
工人们都在壮年,能吃,馅饼至少得来五个(半斤),一瓶啤酒,二两白的。
女工们则多半是拿一个饭盒来,买馅饼,或炒豆腐、花卷,带到车间里去吃。
有一些退休的职工,不爱吃家里的饭,爱上烤肉刘来吃“野食”,爱吃什么要点儿什么。
有一个文质彬彬的主儿,原来当会计,他每天都到烤肉刘这儿来。
他和家里人说定,每天两块钱的“挑费”都扔在这儿。
2015高考数学易错、易混、易忘题分类汇编
2015高考数学易错、易混、易忘题分类汇编------------函数部分“会而不对,对而不全”一直以来成为制约学生数学成绩提高的重要因素,成为学生挥之不去的痛,如何解决这个问题对决定学生的高考成败起着至关重要的作用。
本文结合笔者的多年高三教学经验精心挑选学生在考试中常见的易错、易混、易忘典型题目,这些问题也是高考中的热点和重点,做到力避偏、怪、难,进行精彩剖析并配以近几年的高考试题作为相应练习,一方面让你明确这样的问题在高考中确实存在,另一方面通过作针对性练习帮你识破命题者精心设计的陷阱,以达到授人以渔的目的,助你在高考中乘风破浪,实现自已的理想报负。
【易错点1】忽视空集是任何非空集合的子集导致思维不全面。
例1、设,,若,求实数a组成的集合的子集有多少个?【易错点分析】此题由条件易知,由于空集是任何非空集合的子集,但在解题中极易忽略这种特殊情况而造成求解满足条件的a值产生漏解现象。
解析:集合A化简得,由知故(Ⅰ)当时,即方程无解,此时a=0符合已知条件(Ⅱ)当时,即方程的解为3或5,代入得或。
综上满足条件的a组成的集合为,故其子集共有个。
【知识点归类点拔】(1)在应用条件A∪B=BA∩B=AAB时,要树立起分类讨论的数学思想,将集合A是空集Φ的情况优先进行讨论.(2)在解答集合问题时,要注意集合的性质“确定性、无序性、互异性”特别是互异性对集合元素的限制。
有时需要进行检验求解的结果是满足集合中元素的这个性质,此外,解题过程中要注意集合语言(数学语言)和自然语言之间的转化如:,,其中,若求r的取值范围。
将集合所表达的数学语言向自然语言进行转化就是:集合A表示以原点为圆心以2的半径的圆,集合B表示以(3,4)为圆心,以r为半径的圆,当两圆无公共点即两圆相离或内含时,求半径r的取值范围。
思维马上就可利用两圆的位置关系来解答。
此外如不等式的解集等也要注意集合语言的应用。
【练1】已知集合、,若,则实数a的取值范围是。
2015高考数学容易犯的低级错误
2015年高考数学容易犯的低级错误
1.集合中元素的特征认识不明。
元素具有确定性,无序性,互异性三种性质。
2.遗忘空集。
A含于B时求集合A,容易遗漏A可以为空集的情况。
比如A 为(x-1)的平方>0,x=1时A为空集,也属于B.求子集或真子集个数时容易漏掉空集。
3.忽视集合中元素的互异性。
4.充分必要条件颠倒致误。
必要不充分和充分不必要的区别——:比如p可以推出q,而q 推不出p,就是充分不必要条件,p不可以推出q,而q却可以推出p,就是必要不充分。
5.对含有量词的命题否定不当。
含有量词的命题的否定,先否定量词,再否定结论。
6.求函数定义域忽视细节致误。
根号内的值必须不能等于0,对数的真数大于等于零,等等。
7.函数单调性的判断错误。
这个就得注意函数的符号,比如f(-x)的单调性与原函数相反。
8.函数奇偶性判定中常见的两种错误。
判定主要注意1,定义域必须关于原点对称,2,注意奇偶函数的判断定理,化简要小心负号。
9.求解函数值域时忽视自变量的取值范围。
精心整理,仅供学习参考。
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Uint11.--- What do you think we can do for our aged parents ?----You ______ do anything except to be with them.A don‘t have toB oughtn‘t toC mustn‘tD can‘t2. I sent him an e-mail, ______ my congratulation on his success in winning the first prize in the English competition.A to offerB offeringC offeredD to be offered3. ----What did the teacher talk with you just now?-----Well ,he asked _____ the composition.A how am I getting along withB how I am getting along withC. how I was getting along with D how was I getting along with4. It is not getting all you want but enjoying all you have _____brings you happiness.A whichB whatC thatD who5. Sam has been appointed _____manager of the sales department to take ___place of George.A / , /B / ,theC the , theD the , /6. ---- Why are you so late ? ------ I was on the half the way when it ______to me that I had leftmy notebook home, so I had to fetch it.A occurredB hitC happenedD reminded7. I feel so excited ! At this time tomorrow I _______ to Shanghai.A will be flyingB will flyC have been flyingD have flown8. Don‘t lose heart .You are ______ to make progress as long as you don‘t give up.A beneficialB scaredC boundD suitable9 If the noise goes on , I‘m afraid I shall have no _______but to leave.A . absenceB ambitionC alternativeD assignment.10. Cheer up, Maria!You can also enjoy ____ you have been dreaming of ,if you don‘t give up.A as a convenient life asB as convenient a life asC as a life convenient asD convenient as a life asKRY: ABCCB AACCBBook1-2(Unit 2)1.________an important decision more on emotion than on reason, you will regret it sooner or later.A. BasedB. BasingC. BaseD. To base2. ------shall I come another day to get further information about your bookstore?--------Sure. My secretary and librarian will be at your ___________.A. helpB. companionC. serviceD. request3. The money collected should be made good use _________the people who suffered a lot in the earthquake.A. of helpingB. to helpC. to helpingD. of to help4. The new policy only covers such people ________have made great contributions during the war.A. whoB. whomC. whichD. as5. The city was attacked by_______terrible weather ________few citizens had ever experience before.A. so asB. so, thatC. such, thatD. such, as6. A 13-year agricultural science and technology innovation project ______later this year to improve China‘s level of technology and international competitiveness.A. was launchedB. has launchedC. will launchedD. will be launched7. The wet weather will continue tomorrow, when a cold front ______to arrive.A. will be expectedB. is expectingC. expectsD. is expected8. ________the traditional business letter, the email plays a more and more important role in thecommercial affairs.A. Largely replacedB. Having largely replacedC. largely to replaceD. having largely been replaced9. A new manager will come to take _______charge of this company, which was in_______charge of Mr.Wang.A. the, theB./, / C the, / D. /, the10. When he was driving home, he was stopped by the policeman and was________of speeding.A. chargedB. blamedC. accusedD. warned11. You _____as well do this now, for you will have do it sooner or later.A. needB. mustC. canD. may12. The family as well as a dog _______on the roof by the flood.A. was trappedB. trappedC. were trappedD. trapping13. The interviewee has no inner shame to show his edge over others, ______the outer fear.A. As he hasB. So had heC. Nor did he haveD. Neither does he have14. If you don‘t plan to stay there long in the coming holiday,_______A. So do IB. So will IC. Nor do ID. Nor will I.15. It‘s believed that______you work,_______result you‘ll get.A. the harder, the betterB. harder, betterC. more hard, more betterD. the more hard, the better16. ------I reminded you not to forget the appointment.-----_______________.A. So you didB. So I do notC. So did youD. So do I17. ---I like to surf the Internet but I don‘t like to play games.----_____________.A. So do IB. Nor do IC. As do ID. So it is with me18. Alexander tried to get his work ______in the medical circles.A. to recognizeB. recognizingC. recognizeD. recognizedAnswers: 1-5 BCDDD 6-10 DDBDC 11-15 DCDDA 16-18 ADD“江淮十校”八月联考试题1.________ wish always remains unrealistic that you can come _______ first in the final exam when you make no efforts at all.A.A; aB. A; theC. The; theD. The; /2.------John, isn‘t it a dangerous job as a police officer?------Sometimes I wish it were. Right now all I do is write traffic tickets. It is _______interesting.A.everything butB. anything butC. nothing butD. something but3.------Did you hand in your research paper to our history teacher this morning?-------Yes, I _______on it for more than two months.A.have workedB. had workedC. was workingD. had been working4.The electricity current from the equipment will add up to _________ a total village light that night.A.makingB. makeC. be madeD. being made5.------What was it that made Susan rather annoyed with John?-------_________.A.Because he kept her waiting overtimeB. Because of her being kept waiting overtimeC. Being kept waiting overtimeD. Keeping her waiting overtime6.If I had realized the severe situation I am in for the time being, I ______ my teacher‘s advice.A.have followedB. must have followedC. would followD. would have followed7.--------Don‘t give up. ________and you will get over it soon.--------You are really very nice to say so.A. Another effortB. If you make another effortC. Making another effortD. With another effort8.Hard ________ it is raining, they continue to help the farmers harvest the crops in the field.A. whenB. asC. whileD. although9.As she likes dressing up in a stylish way, sometimes it is rather difficult to ________ who she is at first sight.A. make outB. speak outC. work outD. find out10.---------- You need a bit of cold water in there to make it comfortable. Not too cold. ________. -----------I got it.A. You betB. Be yourselfC. Mind youD. Hurry up第二次周考试题11.------I was busy answering the phone just now. Beg your pardon?------I ______ drink the running water.A. tell you don‘tB. tell you not toC. told you didn‘tD. told you not to12.------_______Mr. Thompson _______tomorrow?------- No. He is on holiday in New York with his family.A. Has; workedB. Does; workC. Did; workD. Is; working13. The girl knows three foreign languages, _______we all think makes it easier for her to find agood job.A. whichB. whomC. itD. that14. Because the situation of the company is not ideal, no longer _______ a better pay and a higher position.A. will he faceB. he will faceC. should he faceD. he should face答案:DBDBC DABAC DDAAUnit 3 错题集1. I can‘t believe it! Isaac admitted________Marina‘s money,________to th e police station.A.stealing; takingB.stealing; takenC.to have stolen; takenD.to steal;t aking2.No student______carry a mobile phone into the examination room during the monthly exam.A.mustB.canC.shallD.need3.The wet weather will continue tomorrow when a cold front _____to arrive.A.is expectedB.is expectingC.expectsD.will be expected4.The problem referred to at the meeting ,if____in time ,will have a bad effect on the environment.A.not being dealt withB.not dealing withC.not dealt withD.not to deal with5.I don‘t think they need help ,but I think I should offer_______.A. thereforeB.anywayC.althoughD.somehowing out to________dinner has become______tradition on Mother‘s Day.A.a;aB./;aC.the;aD.the;/7.Helen loses her enthusiasm for her job and can______force herself to show up every day.A.reallyB.nearlyC.slightlyD.hardly8.Jenifer,the woman who was not promoted__her disappointment by looking for other choices but she didn‘t.A.must have handledB.would have handledC.could have handledD.shouldn‘t have handled9.Before I became a morning bus assistant, I‘d heard that Michael was a challenging student who _____never stay calm on the school bus.A.wouldB.mightC.couldD.should10. Experts believe the black boxes from MH370,which is now reported______in India Ocean in March,2014,are in deep water.A. to crashB.crashedC.having crashedD.to have crashed11. It has been proved that short bursts of concentration repeated frequently_____more effective than one long period of concentration.A.isB. areC.beD.to be12."What we know for sure is that the weather______bad that night,that the plane crew_______to change route then to turn back before all contact was lost,‖ Mr Fabius said on Monday.A. was;had askedB.was;askedC.has been;had askedD.has been;have asked13. to giving up smoking, he threw away his Cigarettes.A. Determined; remainedB. Determined; remainingC. Determining; remainedD. Determining; remaining14. Our teacher insisted that the key words worth paying attention before class.A. to underlinedB. was underlinedC. to be underlinedD. to being underlined15.When she returned home, Rose found her computer and she was very confused.A. was removedB. has been removedC. had removedD. had been removed16. With so many things ,I have to work late into the night.A. to deal withB. dealt withC. dealing withD. being dealt with17. ---Anna, where you with so many things in your hands ?---To my office. It has been moved to the third floor.A.are; headingB. will; headC. have; headedD. do; head18.You should have a good night‘s sleep much work you have to do.A.HoweverB. no matterC. althoughD. whatever19. Mrs. Black had such a wonderful time she visited her friends in Sydney last year.A.whenB. thatC. whichD. as20. ---How did you pass the challenging test?---It was a long time I found a series of suitable methods.A.whenB. untilC. sinceD. before21.After completing and signing it, please return the form to us in the envelope .A.providingB. providedC.having providedD.provide22.With economy getting worse , we have reached the point we have to cut down our daily expenses.A.thatB. whichC.whenD. where23.Misunderstandings from lack of social communication, unless properly, may lead to serious problems.A.arisen; handlingB.arising; handledC.rising; handledD. risen; handling24. We had just covered half the journey the engine failed and we could do nothing but wait for help.A. beforeB. sinceC. whenD. until25. The new rule has come into effect that at no time in public places.A. Is smoking permittedB. smoking is permittedC.permits smokingD. does smoking permit 英译汉:1.Yet that boy carried that envied bag of marbles everywhere he went.2.And one by one, he added them to his marble bag.3.The benefits won‘t appear only when kids work long enough.4.Before they choose a gift, they have the option of taking the gift from the former person.Key:1-5BCACB 6-10BDCAD 11-15BABCD 16-20 AAAAD 21-25BDBCA第四组1.--Does ________ foreign visitor have to carry _______ certain amount of money to enter theU.S.?-- Yes, it‘s true.A. the; aB. a; aC. the; theD. a; the2. The Amazon rain forest is now facing danger because people are cutting trees down _____ way for farms, highways and human settlements.A. makingB. to be madeC. to makeD. having been made3. --- Do you want me to show you_______?--- I would like that. Thank you.A. where did I find themB. where I find themC. where do I find themD. where I found them4. Customers can examine and compare whatever goods they want to buy and tell their computers to find them at the best price ________ over the Internet.A. being offeredB. offeringC. offeredD. to be offered5. – People at that time only know two words, ―save‖ and ―assistance‖, they will never stand by. -- _______. Love among human beings is not limited by geography.A. Don‘t mention itB. I don‘t think so.C. That‘s a good idea.D. That‘s the point.6. I want to thank my friend John, without _______ help, I wouldn‘t have been saved.A. hisB. whoseC. whomD. which7. According to the agreement, you _______ be fined if you fail to meet the goal.A. willB. mustC. mightD. shall8. The gas price keeps rising, ________ an average of 7.7 yuan per liter this month.A. hitB. to hitC. hittingD. hits9. The Great Wall is the place __ almost all tourists would like to visit when they come to Beijing.A. whyB. whichC. whenD. where10. The official _______ I thought would be seriously punished received a raise instead.A. whomeverB. whoeverC. whoD. whom11. We have never had such ______ success in football! Yesterday we won the match with ______ score of 5:0.A. a; aB. the; aC. /; theD. a; /12. Great attention must _______ education, especially in the countryside.A. be paid to developB. pay to developC. be paid to developingD. pay to developing13. There are several ways ______ we can cross the river without the help of local villagers.A. to whichB. across whichC. in whichD. on which14. _________, a boy of seventeen should have had three novels published in 2013.A. Unbelievable as might it soundB. As it might sound unbelievableC. As unbelievable it might soundD. Unbelievable as it might sound翻译句子,注意黑体字部分单词的意思。