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提问人：网友waytide 发布时间：2022-01-06

[主观题]

Suppose a scientist isolates a bacterial species that is 1 of the 4 species used in Experi

ment 1. She adds the species to sucrose broth and observes that neither acid nor CO2 is produced. She then adds the species to lactose broth and observes that both acid and CO2 are produced.Based on the results of Experiment 1, the species is most likely:

A.Species A.

B.Species B.

C.Species C.

D.Species D.

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更多“Suppose a scientist isolates a bacterial species that is 1 of the 4 species used in Experi”相关的问题

第1题

听力原文：W: What are you reading, Bill？M: It's this week's New Scientist, why？W: I was jus

听力原文：W: What are you reading, Bill？

M: It's this week's New Scientist, why？

W: I was just wondering. It looks interesting. But I've never actually read it myself. It's for real scientists— or can ordinary people like me understand it？

M: Oh, it's for anyone really. It usually has articles and stories about character affairs and about science as well as papers about new development and research. I am reading about new telephone that allows you to see the person you are speaking to as well as hear him.

W: Oh, I heard about it. Is it on the market yet？ Can I buy one？

M: No, not this one. But the company has made other models to try out on business. This one is special because its color and the image is moving.

W: Oh, that's interesting.

M: You see the first video phones that what they called were made in Japan. But they can only show a still, black and white image. So this video phone is much better than that. Mind you and I'm not sure I want one, would you？

W: Well, no. I don't think I would. I bet it costs a lot of money. Does it say how much it costs？

M: Yes, the early black and white one costs several hundred pounds, but the one the story is about costs several thousand pounds.

W: En. Why does anybody want one, do you think？

M: Business organizations that need to frequently contact overseas organizations would want it. It's like a face-to-face conversation. So maybe a lot of overseas travel can be avoided.

W: Yes, I suppose so.

The following details are tree about the new device EXCEPT ______.

A．it has colour.

B．it has a moving image.

C．it costs less money.

D．it is not on the market.

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第2题

听力原文：W: What are you reading, Bill？M: It's this week's New Scientist, why？W: I was jus

听力原文：W: What are you reading, Bill？

M: It's this week's New Scientist, why？

W: I was just wondering. It looks interesting. It is for real scientists or can ordinary people like me understand it？

M: Oh, it is for anyone really. It usually has articles and stories about character affairs and about science as well as papers about a new development and research. I am reading about a new telephone that allows you to see the person you are speaking to as well as hear him.

W: Oh, I've heard about it. Is it on the market yet？ Can I buy one？

M: No, not this one. But the company has made other models to try out on business. This one is special because it has color and the image is moving.

W: That's interesting.

M: You see the video photos that what they called were made in Japan. But they can only show a still, black and white image. So this video phone is much better than that. Mind you and I'm not sure I want one, would you？

W: Well, no. I don't think I would. I bet it costs a lot of money. Does it say how much it costs？

M: Yes, the early black and white ones cost several hundred pounds, but the one the story is about costs several thousand pounds.

W: Er. Why does anybody want one, do you think？

M: Business organizations that need to frequently contact overseas organizations would want it. It is like a face-to-face conversation. So maybe a lot of overseas travel can be avoided.

W: Yes, I suppose so.

Q. 19. Which of the following details are NOT TRUE about the new device？

Q. 20.Why didn't Bill want one of them？

Q. 21.Which of the statements is INCORRECT about the woman？

Q. 22.What is the conversation mainly about？

(39)

A．It has color.

B．It has a moving image.

C．It costs less money.

D．It is not on the market.

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第3题

Of all the problems facing modern astronomers, perhaps the most fascinating is: "Can intel

ligent life exist elsewhere？" Since the Earth is an unimportant planet moving round an unimportant star, it would be a pride on our part to suppose that we are the only intelligent beings in the universe. But to obtain proof is difficult.

The main trouble is that our neighbor worlds, the bodies in the Solar system appear to be unsuitable for advanced life-forms. The Moon may be ruled out at once; it has hardly any atmosphere. Venus(金星) is little better; the surface temperature is extremely high and the atmosphere is mostly carbon dioxide. Mars with a very thin atmosphere and a severe shortage of water, may well support simple plant life but there seems no hope of finding animals, while the attractive Martians(火星人) of the story-tellers have long since been given up.

Of course this has not stopped the flow of bright ideas for communicating with the supposed people on Mars. In the early nineteenth century the great mathematician Gauss suggested planting treepatterns in Siberia(西伯利亚), so that the Martians would see them and replay suitably. Following up this idea, the Austrian scientist Karl Littrow proposed digging very wide ditches in the Sahara, triangular in patterns, and then filling them with petrol or some substance so that, when lit, the ditches would present Martian observers with a "flaming triangle" which would show the existence here of intelligent minds. Even better were the plans of Charles Cross, a French writer of the 1870's, who wanted to build a large mirror to reflect the sun's rays and concentrate them on the surface of Mars, thereby making a vast burning-glass. By swinging the mirror around, Cross explained it would be practicable to write words in the Martian deserts simply by burning the sand. For many years he bombared(轰击) the French government with literature about this plan and was very disappointed when no official interest was shown.

The opinion of the writer is that ______.

A．there may be other intelligent beings in the universe

B．there are other intelligent beings in the universe

C．people living on the earth are almost certainly the only intelligent beings in the universe

D．people living on the earth are definitely the only intelligent beings in the universe

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第4题

The example given in the third paragraph illustrates how______.A．applied scientist direct

The example given in the third paragraph illustrates how______.

A．applied scientist direct the work of the pure scientist

B．applied science suggests problems for the basic scientist

C．pure scientist operates independently of applied scientist

D．pure scientist plays a more important role than applied scientist

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第5题

1. In 1796, the scientist, Edward Jenner ___________ material

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第6题

The scientist said that the earth_____ round.A、wasB、areC、isD、were

The scientist said that the earth_____ round.

A、was

B、are

C、is

D、were

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第7题

The last three paragraphs suggest thatA．the nutritional scientist helps people a lot.B．the

The last three paragraphs suggest that

A．the nutritional scientist helps people a lot.

B．the nutritional scientist influences people a lot.

C．what the nutritional scientist found may not be trustworthy.

D．what the nutritional scientist found is absolutely reliable.

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第8题

Many a young scientist ______ engaged in the research work.A．haveB．hasC．have beenD．has bee

Many a young scientist ______ engaged in the research work.

A．have

B．has

C．have been

D．has been

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第9题

Many a scientist _______ （have) devoted their lives to science.

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第10题

A good scientist ______ into all aspects era problem in order to find solutions.A．pricksB．

A good scientist ______ into all aspects era problem in order to find solutions.

A．pricks

B．pokes

C．probes

D．peers

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