29． When it thunders, we always see the light before we hear the sound．______ It’s becauseA． our eyes are in front of our earsB． our eyes are cleverer than our earsC． our eyes can see but our ears can-tD．light goes faster than sound
题目
29． When it thunders, we always see the light before we hear the sound．______ It’s because
A． our eyes are in front of our ears
B． our eyes are cleverer than our ears
C． our eyes can see but our ears can-t
D．light goes faster than sound
相似考题
参考答案和解析
29.D【解析】这是一个科普常识，因为光速比声速快。
更多“29． When it thunders, we always see the light before we hear the sound．______ It’s becauseA． our eyes are in front of our earsB． our eyes are cleverer than our earsC． our eyes can see but our ears can-tD．light goes faster than sound”相关问题
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第1题：
B
Jack is a famous writer now．But he said he was not a good student when he was young．He was often late for class and didn’t like doing his homework． Sometimes he slept in class while the teacher was teaching．He didn't understand much, but he always thought he under-stood everything．．
One day the teacher asked the students a question, "When John was ten years old, his brother was twenty． John is fifteen now and how old is his brother?" Jack answered, "That's easy． His brother is twice as old as John, so he is now thirty． "
Another time, the teacher in a science class asked, "When it thunders(打雷) , why do we always see the light before we hear the sound? "But, Miss White," said Jack quickly, "can't you ．see our eyes are in front of our ears?"
The third time, the teacher in a biology class asked, "Why can fish swim in the water?" "But, Miss White," said Jack quickly, "don't you know fish can-t walk on land?"
( )26．Jack was not ________． when he was young．
A．strong
B．lazy
C．clever
D．well
正确答案：C
26.C【解析】由第一段可知Jack小时候并不聪明，也不勤奋，故选C. -
第2题：
As you will see in our price-list, we have offered very competitive prices, supplying you our best quality goods.We solicit that you will favor us with your orders, which shall always have our best attention.(英译中)
参考答案：贵公司将会从我方价格表中看到，我方向贵公司提供了价廉物美的商品。敬请贵公司向我方订货，我方会精心关照的。
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第3题：
______school is much larger than ______．
A．Our；your
B．Our；yours
C．Ours；yours
D．We；you
正确答案：B
本题考查形容词性物主代词和名词性物主代词的用法和区别，前者后面
要加名词，而后者后面不能加名词，根据第一空后的school可判断第一空应用0ur，第二空后无名词，故应用yours，答案为B。
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第4题：
We experience a burst of pleasure when we share our thoughts,and this drives us to communlcate.It is a useful feature of our brain,because it ensures that knowledge,experience and ideas do not get buried with the person who first had them,and that as a society we benefit from the products of many minds.Of course,in order for that to happen,merely sharing is not enough.We need to cause a reaction.Each time we share our opinions and knowledge,it is with the intention of having an impact on others.Here's the problem,though:we approach this task from inside our own heads.When attempting to create impact,we reflect on what is persuasive to us,our state of mind.our desires and our goals.But if we want to affect the behaviours and beliefs of the person in front of us,we need to understand what goes on inside their head.答案：解析：我们在分享自己的想法时会感到一阵愉悦．正是这种感觉驱使我们进行交流。我们大脑的这个特点非常有用．因为它保证了知识、经验和想法不会随着它们最初的拥有者而遭到埋没；我们作为一个社会，则能从许多聪明人的成果中受益。当然，要使这种情况发生，单纯的分享是不够的。我们需要引起一个反应。我们每次分享自己的意见和知识时，正是抱着对他人施加影响的目的。但这正是问题所在：我们从自己的内心出发处理这件事情。当我们试图造成影响时，我们回想对我们具有说服力的东西．我们的精神状态，我们的渴望以及我们的目标。但我们如果想影响我们面前这个人的行为和想法，却需要理解他们的脑子里在想什么。 -
第5题：
资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself，look at an object out of one eye；Then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
Having two eyes instead of one is particularly useful for______.A.looking over a wide area
B.seeing objects far away
C.judging distances
D.seeing at night答案：C解析：本题考查的是细节理解。
【关键词】Having two eyes instead of one；useful for
【主题句】第5自然段Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle.拥有两只好眼睛对于判断距离非常重要。每只眼睛从略微不同的角度看东西。
【解析】本题的问题是“两只眼睛相较一只眼睛对于______特别有用。”A选项“俯瞰广阔的区域”；B选项“远处看物体”；C选项“判断距离”；D选项“晚上看东西”。根据主题句，C选项正确。 -
第6题：
资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself，look at an object out of one eye；Then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
When things far away seem indistinct， one is probably______.A.astigmatic
B.far-sighted
C.suffering from cataracts
D.near-sighted答案：D解析：本题考查的是细节理解。
【关键词】things far away；indistinct
【主题句】第2自然段People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）. 近视的人只能看到非常接近他们眼睛的东西，其他一切看起来都很模糊（=不清楚）。
【解析】本题的问题是“当远处的东西看起来模糊不清时，可能就是？”A选项“散光”；B选项“远视”；C选项“患有白内障”；D选项“近视”。根据主题句，看不清远方的东西，应当是患有近视，故D选项正确。 -
第7题：
_______a microscope we can see different kinds of things that are unable to be seen by our naked eyes.A.In terms of
B.In place of
C.By means of
D.By far答案：C解析： -
第8题：
Normally when we read our eyes flick backwards and forwards over the text.（）
A对
B错
对
略 -
第9题：
Normally when we read our eyes flick backwards and forwards over the text.（）
正确答案:正确 -
第10题：
问答题There are great impediments to the general use of a standard in pronunciationcomparable to that existing in spelling (orthography). One is thefact that pronunciation is learnt ‘naturally’ and unconsciously, and orthography 1．_______is learnt deliberately and consciously. Large numbers of us, in fact, remainthroughout our lives quite unconscious with what our speech sounds 2．_______like when we speak out, and it often comes as a shock when we 3．_______firstly hear a recording of ourselves. It is not a voice we recognize at once, 4．_______whereas our own handwriting is something which we almost always know. We 5．_______begin the ‘natural’ learning of pronunciation long before we start learning toread or write, and in our early years we went on unconsciously imitating and 6．_______practicing the pronunciation of those around us for many more hours per every 7．_______day than we ever have to spend learning even our difficult English spelling.This is ‘natural’, therefore, that our speech-sounds should be those of our im 8．_______mediate circle; after all, as we have seen, speech operates as a means of holding acommunity and to give a sense of ‘belonging’. We learn quite early to recognize a 9．_______‘stranger’, someone who speaks with an accent of a different community — perhapsonly a few miles far. 10．_______正确答案：
1.and改为while/whereas/but/yet。 这里要表示的是对比关系,而不是并列关系。
2.with改为of。 be conscious of是固定搭配,意为“意识到”。
3.去掉out。 “说话”用speak,speak out说出。
4.firstly改为first。 first第一次,首次。firstly第一,首先。
5.which改为that。 不定代词something的定语从句只能由that引导,而不能用which,
6.went改为go。 真理性的陈述用一般现在时表达。
7.去掉per或every。 可以说every day也可以用per day,两个词不能连用。
8.This改为It。 这里要用it作形式主语,而真正的主语则是后面的that从句。
9.community后加together。 hold together使团结,使结合。
10.far改为away。 表示“几英里以外的”要说a few miles away。解析： 暂无解析 -
第11题：
单选题In this passage, the author mainly tells us that _____.Aeveryone can be forgetful sometimes regardless of one’s age
Bwe can prevent our sound mind from aging with certain methods
Cbrain aging starts from the time when we are in our 20s and 30s
Dmemory loss is a sign that shows we are getting old
正确答案： B解析：
本文主要介绍了人脑老化现象和健脑的方法。 -
第12题：
判断题Normally when we read our eyes flick backwards and forwards over the text.（）A对
B错
正确答案： 错解析： 暂无解析 -
第13题：
Passage Two
When we see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are nearsighted can only see things that are very close to their eyes. Everything else is not so clear. Many people who do a lot of close work, such as writing, reading and sewing, become near sighted. Then they have to wear glasses in order to see distant (远处的) things clearly'.
People who are nearsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle (角度). To prove this to yourself, look at an object out of one eye; then look at the same object out
of the other eye. You will find the object's relation to the background (背景) and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
40. We should take good care of our eyes ______.
A. only when we cannot see perfectly
B. only when we can see well
C. even if we can see well
D. only when we realize how important our eyes are
正确答案：C40．答案为C 此考题为推理题。根据作者在第1段第2句所表达的，等到我们两眼视力下降了我们才认识到眼睛的重要性，我们就可断定C正确。
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第14题：
As umbrella prices in our last order were much higher than those prevailing in our market, we expect a corresponding reduction of your prices to around US$ 30dozen and would be interested to hear whether you can accept our order of 3,000dozen.(英译中)
参考答案：我方上次订购的雨伞的价格远远高于在我方市场上的现行价格，因此，我们期望贵公司能相应地将价格降至每打30美元，同时想知道贵公司是否可以接受我方3000打的订货。
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第15题：
The sentence "But we pay for our sensitivity." in the third paragraph implies that______.
A) we should pay a debt for, our feeling
B) we have to be hurt when We feel something
C) our pain is worth feeling
D) when we feel pain, we are suffering it
正确答案：D
答案：D
[试题分析]综合理解题。
[详细解答]根据上下文，因为下一句指出We can feel pain when the slightest thing is wrong with any part of our body．显然，这里pay for不是“付钱”的意思，而是指“为…付出”。因此，D为最佳答案。
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第16题：
资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself，look at an object out of one eye；Then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
People who suffer from astigmatism have______.A.a difficulty that can be corrected by an operation
B.eyes that are not exactly the right shape
C.an eye difficulty that cannot be corrected by glasses
D.one eye bigger than the other答案：B解析：本题考查的是细节理解。
【关键词】people；suffer from astigmatism
【主题句】第4自然段Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. 其他人看不清楚，因为他们的眼睛形状不规则。他们有所谓的散光。 这也可以通过眼镜来纠正。
【解析】本题的问题是“患有散光的人__________。”A选项“可以通过手术纠正问题”；B选项“眼睛形状不规则”；C选项“一种无法用眼镜矫正的视力问题”；D选项“一只眼睛比另一只眼睛大”。根据主题句，散光主要是眼睛形状不规则造成的，但是可以通过戴眼镜来矫正，因此B选项正确。 -
第17题：
资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself，look at an object out of one eye；Then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
The underlined word suffer in the third paragraph probably means______.A.feel pain
B.imagine
C.are affected with
D.experience答案：A解析：本题考查的是推理判断。
【关键词】suffer；in the third paragraph；mean
【主题句】第3自然段People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. 远视的人遭遇了相反的问题。他们可以看到很远的东西，但是他们看书有困难，除非保持一定的距离，否则很难阅读。
【解析】本题的问题是“第三段中带下划线的词suffer可能意味着_______”A选项“感到痛苦”；B选项“想象”；C选项“受到影响”；D选项“经历，经验”。根据主题句，远视的人遭遇着相反的问题，故A选项正确。 -
第18题：
资料：When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near-sighted.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm’s length. If they want to do much reading，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism. This，too，can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself，look at an object out of one eye；Then look at the same object out of your other eye. You will find the object’s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
We should take good care of our eyes______.A.even if we can see well
B.only when we cannot see perfectly
C.only when we realize how important our eyes are
D.only when we can see well答案：A解析：本题考查的是细节理解。
【关键词】take good care of；our eyes
【主题句】第1自然段When we see well，we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are. 当我们看东西很清楚的时候，我们不经常想到我们的眼睛。只有当我们无法完美地看到时，我们才意识到我们的眼睛多么重要。
【解析】本题的问题是“我们应该好好保护我们的眼睛________”A选项“即使我们能看得很清楚”；B选项“当我们无法完美地看到时”；C选项“只有当我们意识到我们的眼睛有多重要时”；D选项“只有在我们能够看得出来的时候”。根据主题句分析可知，我们无论何时都要保护好眼睛，不要在看不清的时候才意识到严重性，故A选项符合题意。 -
第19题：
（） for more than 30 years, we are confident we can give our customers complete satisfaction.
Having been in business
略 -
第20题：
We use our tongue to（）.
- A、 feel
- B、 taste
- C、 touch
- D、 see
正确答案:B -
第21题：
填空题（） for more than 30 years, we are confident we can give our customers complete satisfaction.正确答案： Having been in business解析： 暂无解析 -
第22题：
单选题______ our great surprise, our company has made much more profit than we expected lastyear.AFor
BIn
CWith
DTo
正确答案： A解析：
句意：让我们吃惊的是，我们公司的盈利大大超出了我们去年所预计的。本题考查固定搭配。to one’s surprise是固定用法，表示“让某人吃惊的是……”。因此D项正确。 -
第23题：
问答题Practice 7 That we are in the midst of crisis is now well understood. Our nation is at war, against a far- reaching network of violence and hatred. Our economy is badly weakened, a consequence of greed and irresponsibility on the part of some, but also our collective failure to make hard choices and prepare the nation for a new age. Homes have been lost; jobs shed; businesses shuttered. Our healthcare is too costly; our schools fail too many; and each day brings further evidence that the ways we use energy strengthen our adversaries and threaten our planet. On this day, we gather because we have chosen hope over fear, unity of purpose over conflict and discord. On this day, we come to proclaim an end to the petty grievances and false promises, the recriminations and worn out dogmas, that for far too long have strangled our politics. This is the journey we continue today. We remain the most prosperous, powerful nation on Earth. Our workers are no less productive than when this crisis began. Our minds are no less inventive, our goods and services no less needed than they were last week or last month or last year. Our capacity remains undiminished. But our time of standing pat, of protecting narrow interests and putting off unpleasant decisions - that time has surely passed. Starting today, we must pick ourselves up, dust ourselves off, and begin again the work of remaking America. (Barack Obama: Inaugural Address)正确答案： 【参考译文】
现在我们都深知,我们身处危机之中。我们的国家在战斗,对手是影响深远的暴力和憎恨;国家的经济也受到严重的削弱,原因虽有一些人的贪婪和不负责任,但更为重要的是我们作为一个整体在一些重大问题上决策失误,同时也未能做好应对新时代的准备。我们的人民正在失去家园,失去工作,很多企业倒闭。社会的医疗过于昂贵、学校教育让许多人失望,而且每天都会有新的证据显示,我们利用能源的方式助长了我们的敌对势力,同时也威胁着我们的星球。今天,我们在这里齐聚一堂,因为我们战胜了恐惧选择了希望,摒弃了冲突和矛盾而选择了团结。
今天,我们宣布要为无谓的摩擦、不实的承诺和指责画上句号,我们要打破牵制美国政治发展的若干陈旧教条。
今天我们继续先辈们的旅途。美国依然是地球上最富裕、最强大的国家。同危机初露端倪之时相比,美国人民的生产力依然旺盛;与上周、上个月或者去年相比,我们的头脑依然富于创造力,我们的商品和服务依然很有市场,我们的实力不曾削弱。但是,可以肯定的是,轻歌曼舞的时代、保护狭隘利益的时代以及对艰难决定犹豫不决的时代已经过去了。从今天开始,我们必须跌倒后爬起来,拍拍身上的泥土,重新开始工作,重塑美国。解析： 暂无解析