单选题We see lightning before we hear the thunder because sound travels more slowly than light is.Abefore weBbecauseCmore slowlyDlight is
单选题
We see lightning before we hear the thunder because sound travels more slowly than light is.
A
before we
B
because
C
more slowly
D
light is
参考解析
解析：
相关考题：
Driven by the need for fun, we always have a powerful () incentive to keep trying to learn as much as we can. A、surrenderedB、thunder-struckC、impenetrableD、genetic
Because we can’t find a compromise________ A.we’ve ever given before.B.but I got nothing out of it.C.and there are two hundred and sixteen thousand employees worldwide.D.I am afraid we can go no further.
We usually shrug ___________ the words we are really glad to hear. A. ofB. aroundC. offD. ahead
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
Sunday was going to be the birthday for me and my other two classmates． As we were born in the (21) month，we decided to have a big party to (22) it．On that evening，we invited all of our classmates． We prepared a lot of food and drinks．After singing the birthday song，we (23) the delicious cake together． We sang more songs and played games． Then someone told funny stories，and (24) laughed． Three hours flew by quickly．Because we had to (25) before 11:00，we ended our party at 10:00． Before we left，our classmates gave' (26 )0f us a birthday card with their best wishes． ( 27) we took some pictures together． What a great time we had! At that moment，l felt love，happiness and friend- ship．Before the party，only my (28) could remember my birthday，and l had never had such a big party and so many friends wishes．(29) I wanted to say to my classmates，"Thank you，and I will (30) forget this evening，especially each of you!( )21．A．differentB．bestC．sameD．some
Passage TwoWhen 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 outof 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 perfectlyB. only when we can see wellC. even if we can see wellD. only when we realize how important our eyes are
Some of them did not get a chance to see the Olympic flame because of the () changes, but we, indeed, feel their passion for China and the Olympics. A.profitB.suspendC.escapeD.route
We should see the events in their historical ________ before we draw any conclusion.A respectiveB retrospectiveC prospectiveD perspective
We are interested in the weather because it ______ us so directly — what we wear, what we do, and even how we feel. A.benefitsB.affectsC.affectsD.effects
You see the lightning _____ it happens, but you hear the thunder later. A.in an instantB.on the instantC.for an instantD.the instant
Because of the recent fire in the factory, all the stocks were destroyed. (), we cannot make shipment as arranged before.A、In the caseB、In this casesC、In this eventD、At this event
Unless we () you to the contrary, we shall assume said modification .A、hear ofB、hear outC、hear withD、hear from
You see the lightening ____________ it happens, but you hear the thunder later.A、the instantB、for an instantC、on the instantD、in an instant
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 wellB.only when we cannot see perfectlyC.only when we realize how important our eyes areD.only when we can see well
It′ s a long time __________ I saw youlast.--Yes, and what a pity! It will be a longtime __________ we see each other again.A.since; before B.when; sinceC.before; when D.before; since
翻译：I’d like to remind you that we have to withdraw our offer if we don ’ t hear from you by next Monday.
单选题We see lightning before we hear the thunder because sound travels more slowly than light is.Abefore weBbecauseCmore slowlyDlight is
单选题（）,we often hear only what we want to hear, rather than really listening to other people.ATraditionallyBAdditionallyCConditionallyDExceptionll
问答题Practice 1 No one knows what time itself is. We cannot see it. We cannot touch it. We cannot hear it. We know it only by the way we mark its passing. For all our success in measuring the tiniest parts of time, time remains one of the great mysteries of the universe. One way of thinking about time is to imagine a world without time. There could be no movement, because time and movement cannot be separated. A world without time could exist only as long as there were no changes. For time and change are linked. When something changes, you know time has passed.
问答题As holidays go, Thanksgiving is in some ways the most philosophical. Today we try not to take for granted the things we almost always take for granted. We try, if only in that brief pause before the eating begins, to see through the well-worn patterns of our lives to what lies behind them. In other words, we try to understand how very rich we are, whether we feel very rich or not. Today is one of the few times most Americans consciously set desire aside, if only because desire is incompatible with the gratitude—not to mention the abundance-that Thanksgiving summons.
填空题We eat at the fast food restaurants more because it is quick than because we really need the food.____
单选题From the passage we know people need newly produced atlases because ______.Athey can’t see the old ones clearlyBthey like to buy different onesCsomething has changedDsomething is missing