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提问人：网友wangdahong 发布时间：2022-01-07

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Cement is a powder with the property of setting into a hard mass after it has been mixed with water.

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更多“Cement is a powder with the property of setting into a hard mass after it has been mixed with water.”相关的问题

第1题

听力原文：One of the important materials used in the construction of buildings and roads is

听力原文： One of the important materials used in the construction of buildings and roads is cement. It is a powder made mainly from limestone and clay. Even though the ancient Egyptians and Romans used a kind of cement, it was not until 1824 that an English bricklayer developed cement strong enough for modern roads and buildings.

While the bricklayer was experimenting in his kitchen, he found that a mixture of limestone and clay that had been heated formed a substance. This substance became hard and stone-like as it cooled. When it was grounded into a fine powder, it could be stored.

When the powder was mixed with water, it made an excellent quality of cement that quickly hardened in sunlight or even under water, it made an excellent quality of cement that is used today.

(30)

A．An Egyptian.

B．A Roman.

C．A British.

D．A man named Blake.

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第2题

水／粉比（water／powder ratio，W／P ratio)

水／粉比(water／powder ratio，W／P ratio)

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第3题

听力原文：W: Excuse me, do you know how it works？M: Yes. Put the washing inside, shut the d

听力原文：W: Excuse me, do you know how it works？

M: Yes. Put the washing inside, shut the door, the money goes here. Then when the machine starts, you have to put the soap powder in through here.

W: Is that all？

M: Yes.

W: But is there anything I should do when it works？

M: You don't have to do anything else until the machine stops.

W: Thank you very much.

What can we learn from this conversation？

A．The man knows how to use the machine.

B．The woman knows how to use the machine.

C．They both know how to use the machine.

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第4题

听力原文：W: Excuse me. Do you know how this works？ M: Yes. Put the washing inside.., shut

听力原文：W: Excuse me. Do you know how this works？

M: Yes. Put the washing inside.., shut the door.., the money goes in here. Then when the machine starts you have to put the soap powder in through here.

W: Is that all？

M: Yes.

W: But is there anything I should do when it works？

M: You don't have to do anything else until the machine stops.

W: Thank you so much.

Q8. What can we learn from this conversation？

(14)

A．The woman is willing to do the washing for the man.

B．The man wants the woman to do the washing for him.

C．The woman knows little about the machine.

D．The man knows nothing about the machine.

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第5题

听力原文：M: Excuse me. I've never, used one of these before. Could you tell me what to do？

W: Yes, of course. Well, put your clothes in first. Shut the door. Measure out your soap powder in this mug. Choose your temperature. Push the money in and it stars automatically.

What does the man ask the woman to do？

A．To teach him how to use a microwave oven.

B．To teach him how to use a washing machine.

C．To tell him how to use an automatic vending machine.

D．To tell him how to use an automatic hot-water machine.

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第6题

听力原文：W: Excuse me. Do you know how this works？M: Yes. Put the washing inside, shut the

听力原文：W: Excuse me. Do you know how this works？

M: Yes. Put the washing inside, shut the door, the money goes in here. Then when the machine starts you have to put the soap powder in through here.

W: Is that all？

M: Yes.

W: But is there anything I should do when it works？

M: You don't have to do anything else until the machine stops.

W: Thank you so much.

(17)

A．The woman is willing to do the washing for the man.

B．The man wants the woman to do the washing for him.

C．The woman knows little about the machine.

D．The man knows nothing about the machine.

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第7题

听力原文：M: So how come you chose psychology？W: Well, at lust I didn't have any clear idea

听力原文：M: So how come you chose psychology？

W: Well, at lust I didn't have any clear idea of what I wanted to do after university, I didn't say to myself "I want to be a clinical psychologist or a researcher or anything like that". (22) I suppose I have just always been interested in people and the way they act.

M: And what was the course like？

W: It was just great. The teachers were all really friendly and they had this special approach to teaching. (23) The whole course was based on a problem-solving approach.

M: I see from your CV that you graduated in 1997 and after that, let me see...

W: I got a job with the department of employment. It was only a temporary thing for about six months. (24) I used to have to design questionnaires and things like that for surveys that they carried out. And I guess the psychology course at college helped me a lot.

M: So why did you leave？

W: Well, four years is a long time to be asking people questions. You know those sorts of questions about washing powder and shampoo. After two years of doing that I felt that while I could do it well, now I want to do something else that's a little different. (25) It just wasn't challenging for me any more and because I needed a challenge I decided to move when I heard about the position of Senior Researcher here at institute I knew that's exactly what I want.

(23)

A．Be a researcher in the area.

B．Be a clinical psychologist.

C．Know how to be a problem-solver.

D．Know more about people's behavior.

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第8题

听力原文：M: So how come you chose psychology？W: Well, at lust I didn't have any clear idea

听力原文：M: So how come you chose psychology？

W: Well, at lust I didn't have any clear idea of what I wanted to do after university, I didn't say to myself "I want to be a clinical psychologist or a researcher or anything like that". I suppose I have just always been interested in people and the way they act.

M: And what was the course like？

W: It was just great. The teachers were all really friendly and they had this special approach to teaching. The whole course was based on a problem-solving approach.

M: I see from your CV that you graduated in 1997 and after that, let me see...

W: I got a job with the department of employment. It was only a temporary thing for about six months. I used to have to design questionnaires and things like that for surveys that they carried out. And I guess the psychology course at college helped me a lot.

M: So why did you leave？

W: Well, four years is a long time to be asking people questions. You know those sorts of questions about washing powder and shampoo. After two years of doing that I felt that while I could do it well, now I want to do something else that's a little different. It just wasn't challenging for me any more and because I needed a challenge I decided to move when I heard about the position of Senior Researcher here at institute I knew that's exactly what I want.

(23)

A．Be a researcher in the area.

B．Be a clinical psychologist.

C．Know how to be a problem-solver.

D．Know more about people's behavior.

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第9题

7 Portland cement

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