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听力原文：Can you imagine ice that does not melt and is not wet？ Have your ever heard of dr

听力原文： Can you imagine ice that does not melt and is not wet？ Have your ever heard of dry ice？ Dry ice is made by freezing a gas. It is quite different from ordinary ice which is simply frozen water. Dry ice was first manufactured in 1925. It has since fulfilled the hope of its invent or. It can be used for making artificial fog in the movies. When steam is passed over dry ice, a very dense vapor rises. It can also be used for destroying insects in grain supplies. It is more practical than ordinary ice because it takes up less space and it is 142 degrees colder. Since it turns into steam, instead of melting into water, it is cleaner to use. For these reasons, it is extremely popular and many people prefer it to ordinary ice. Dry ice is so cold that if you touch it with your bare fingers, it will burn you.

(33)

A．Chemicals.

B．Vapor.

C．Water.

D．Gas.

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发布时间：2020-10-21

更多“听力原文：Can you imagine ice that does not melt and is not wet？ Have your ever heard of dr”相关的问题

第1题

听力原文：M：You wouldn't imagine how long the line at the telecommunications business hall.

I waited more than an hour to get through it with an empty stomach.

W：What can I say？ That's what you get for waiting until the last day of the month．

Q：What does the woman imply？

(14)

A．She is not in the place to judge.

B．The man should blame himself.

C．The business deserves the man's waiting.

D．She is not good at giving advice.

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第2题

听力原文：W: I can't imagine you have any interest in attending that lecture on sculpture．F

or you it is so boring.

M: I do．Now you would remind me of the one. And just now I have the time，so come I．

Q: What do we learn about the man from this conversation？

(17)

A．He'd rather not go to the lecture.

B．He doesn't mind if the woman goes to the lecture.

C．He wants to hear the lecture.

D．He's heard the lecture before.

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第3题

听力原文：W：I can't imagine you have any interest in attending that lecture on sculpture. F

or you it is so boring.

M：I do．Now you would remind me of the one. And just now I have the time. So come I.

Q：What do we learn about the man from this conversation？

(17)

A．He'd rather not go to the lecture.

B．He doesn't mind if the woman goes to the lecture.

C．He wants to hear the lecture.

D．He's heard the lecture before.

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第4题

听力原文：M: I really appreciate your filling in on yesterday's lecture.W: No problem. I th

听力原文：M: I really appreciate your filling in on yesterday's lecture.

W: No problem. I thought you might want to go over it together. And, anyway, it helps me revtew.

M: I am. Thanks. So, you said she talked about squid？ Sounds a little strange ....

W: Well, actually, it was about the evolution of sea life — a continuation from last week. The octopus and the squid descended from earlier creatures with shells. They survived by shedding their shells—somewhere between 200 and 500 million years ago.

M: That's a pretty long span of time.

W: I know. That's what she said, though. To be precise: "Exactly when they emerged is uncertain...and why is still unexplained."

M: Some squid are really huge. Can you imagine something that big ifit still had a shell？

W: Actually, it's because they lost their shells that they could evolve to a bigger size.

M: Make sense. But some are really huge. I've read about fishermen that caught squid that weighed over a ton. Did she talk about how that happens？

W: Not really. But she did mention some unusual cases. In 1933 in New Zealand they caught a squid let's see here it was twenty-two yards long. Its eyes were eighteen inches across. Can you imagine？

M: Reminds me of all those stories of sea monsters.

(20)

A．Where they should move.

B．How to negotiate with the landlord.

C．How to fight the increase.

D．Whether to accept an increase in rent or move.

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第5题

听力原文：Why do we cry？ Can you imagine life without tears？Not only do tears keep your eye

听力原文： Why do we cry？ Can you imagine life without tears？

Not only do tears keep your eyes lubricated, they also contain a substance that kills certain bacteria so they can't infect your eyes. Give up your tears and you lose this on-the-spot defence.

Nor would you want to give up the flood of extra tears you produce when you get something physical or chemical in your eyes. Tears are very good at washing this irritating stuff out.

Another thing you couldn't do without your tears is cry - from joy, anger, or sadness.

Humans are the only animals that produce tears in response to emotions. And most people say a good cry makes them feel better.

Many scientists, therefore, believe that crying somehow helps us cope with emotional situations. Tear researcher William Frey is trying to figure out how it happens.

One possibility, he says, is that tears discharge certain chemicals from your body, chemicals that build up during stress. "When people talk about 'crying it out,' I think that might actually be what they are doing," he says.

If Frey is right, what do you think will happen to people who restrain their tears？ Boys, for example, cry only about a quarter as often as girls once they reach their teenage years. And we all cry a lot less now than we did as babies.

Could it possibly be that we face less stress？ Maybe we've found other ways to deal with it. Or maybe we just feel embarrassed.

(33)

A．Why people hold back their tears.

B．Why people cry.

C．How to restrain one's tears.

D．How tears are produced.

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第6题

听力原文：（32)Why do we cry？ Can you imagine life without tears？Not only do tears keep you

听力原文： (32)Why do we cry？ Can you imagine life without tears？

Not only do tears keep your eyes lubricated, they also contain a substance that kills certain bacteria so they can't infect your eyes. Give up your tears, and you' 11 lose this on-the-spot defense. Nor would you want to give up the flood of extra tears you produce when you get something physical or chemical in your eyes. Tears are very good at washing this irritating stuff out.

Another thing you couldn't do without your tears is cry--from joy. anger or sadness.

(33)Humans are the only animals that produce tears in response to emotions. And most people say a good cry makes them feel better. (35)Many scientists, therefore, believe that crying somehow helps us cope with emotional situations. Tear researcher, William Frey, is trying to figure out how it happens. "One possibility", he says," is that tears discharge certain chemicals from your body, which build up during stress. When people talk about 'crying it out', I think that might actually be what they are doing."

If Frey is right, what do you think will happen to people who restrain their tears？ (34)Boys, for example, cry only about a quarter as often as girls once they reach their teenage years. And we all cry a lot less now than we did as babies. Could it possibly be that we face less stress？ Maybe we've found other ways to deal with it. Or maybe we just feel embarrassed.

(33)

A．Why people hold back their tears.

B．Why people cry.

C．How to restrain one's tears.

D．How tears are produced.

点击查看答案

第7题

听力原文：M: I really appreciate your filling me in on yesterday' s lecture.W: No problem:

听力原文：M: I really appreciate your filling me in on yesterday' s lecture.

W: No problem: I thought you might want to go over it together. As anyway, It helps me review. Hope you' re feeling better now.

M: I am. Thanks. So, you said she talked about squid？ Sounds a little strange.

W: Well, actually, it was about the evolution of sea life --a continuation from last week. The octopus and the squid descended from earlier creatures with shells. They survived by shading the shells, somewhere between 200 and 500 million years ago.

M: That' s a pretty long span of time.

W: I know. That' s what she said, though. To be precise: "Exactly when they emerged is uncertain ... and whyis still unexplained."

M: Some squid are really huge. Can you imagine something that big ifit still had a shell？

W: Actually, it' s because they lost their shells that they could evolve to a bigger size.

M: Make sense. But some are really huge. I' ve read about fishermen that caught squid that weighed over a ton. Did she talk about how that happens？

W: Not really. But she did mention some unusual cases. In 1933 in New Zealand they caught a squid ... let' s see here ... it was twenty-two yards long. Its eyes were eighteen inches across. Can you imagine？

M: Reminds me of all those stories of sea monsters.

W: Dr. Simpson thinks there are probably even larger ones that have been found, because squid are intelligent and fast so they can easily get away from humans. Maybe some of those monster stories are true.

(23)

A．Mating habits of squid and octopus.

B．The evolution of certain form. of sea life.

C．The study of marine shells.

D．Survival skills of sea creatures.

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第8题

听力原文：Recently the term "health" has come to have a wider meaning than it used to. It n

听力原文： Recently the term "health" has come to have a wider meaning than it used to. It no longer means just the absence of illness. Today, health means the well-being of your body, your mind and your relationships with other people. This new concept of health is closely related to another term--quality of life. Quality of life is the degree of overall satisfaction that a person gets from life.

Why has the emphasis of health shifted from the absence of disease to a broader focus on the quality of a person's life？ One reason for this has to do with the length and conditions of life that people can now expect. Medical advances have made it possible for people today to live longer, healthier lives. Imagine for a moment that you were born in the year 1900；you could have expected on average to live until about the age of 47. In contrast, if you were born in the year 1999, you could expect to live to the age of 75 or be older.

(30)

A．Different interpretations of the term “health.”

B．Improving the quality of life

C．The importance of health to quality living.

D．People's expectations of a long and healthy life.

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第9题

听力原文：Do you know that there's a kind of bird that can sew？ This bird, called the tailo

听力原文： Do you know that there's a kind of bird that can sew？ This bird, called the tailorbird, uses its mouth as a needle. It sews leaves together in a shape of a cup. Then it adds a layer of straw to the inside of the cup and lays its eggs there. Each bird species builds its own special kind of nest. The most common materials used for nests are grasses, branches and feathers. A bird must weave these materials into a nest. Just imagine building a house without cement or nails to hold it together. Another bird is called the weaverbird. The weaverbird builds a nest that looks like a basket. The nest is shaped like a pear with a hole in the middle. The hole is the door of the nest. The third bird is called the ovenbird. The ovenbird makes a nest that is very solid. The nest is made of mud. The ovenbird forms the mud into the shape of an oven and then lets it dry in the sun. The sun bakes the mud, making it very hard. Not all birds make their homes in branches. Some birds build their nests on the ground, while others bury their eggs under the ground. And some birds do not build nests at all. So when you look for nests and eggs in the branches of trees and bushes, remember, that some nests may be right under your feet.

(38)

A．A basket.

B．A cup.

C．An egg.

D．An oven.

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