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提问人：网友georgecxd 发布时间：2022-01-06

[主观题]

The scientists are interested in studying tree rings because they can tell______.A．whether

The scientists are interested in studying tree rings because they can tell______.

A．whether in that area the climate was healthy or not

B．whether a particular tree was healthy or not

C．whether people, took good care of the trees or not

D．how old the trees were

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更多“The scientists are interested in studying tree rings because they can tell______.A．whether”相关的问题

第1题

I have had the pleasure of training more than 80 younger scientists among which several ar

e ______.

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第2题

Reading between the lines, I should say the scientists are disappointed for the outcome of

the research project, though they will not openly admit it.

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第3题

According to the passage，scientists have discovered that influenza viruses______.A．cause i

According to the passage，scientists have discovered that influenza viruses______.

A．cause ill health in wild birds

B．do not always cause symptoms in birds

C．are rarely present in wild birds

D．change when transferred from animals to man

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第4题

What can be inferred from the passage？A．Most scientists are confident that the spacecraft

What can be inferred from the passage？

A．Most scientists are confident that the spacecraft will work well.

B．A more ambitious orbital flight will follow this mission.

C．The author is quite sure that this mission will make impossible technologies seem possible.

D．The key of the engineering of Cosmos I is building wings that can open and pivot.

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第5题

Which of the following is NOT included in the scientists' suggestions？A．Farmers use less i

Which of the following is NOT included in the scientists' suggestions？

A．Farmers use less insecticides.

B．Farmers spray only where posts have actually been seen.

C．Farmers could use a combination of two or three insecticides at once.

D．Farmers shouldn't try to attract insects onto the crops.

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第6题

Land is becoming desert little by little because ______.A．plants can't grow thereB．there i

Land is becoming desert little by little because ______.

A．plants can't grow there

B．there is not enough rain

C．people haven't clone what scientists wish them to do

D．scientists know little about the deserts

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第7题

Bob: What are you reading, Frank？ Tom: It's this week's New Scientist, why？ Bob: I was jus

t wondering--______, but I've never actually read it myself. Is it aimed at real scientists or can ordinary people like me understand it？

A．it's for anyone really

B．where I can buy it

C．it seems very expensive

D．it looks interesting

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第8题

We need to know something about the structure and operation of science because （)．A． it i

We need to know something about the structure and operation of science because ()．

A． it is not easy to understand the things that excite and frustrate scientists

B． science affects almost every aspect of our life

C．scientists live in a specific subculture

D．it is easier to understand general characteristics of science

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第9题

听力原文： One way that scientists can learn about man is by animals, such as mice, rats an

d monkeys. The scientists in this laboratory are experimenting on mice. They are studying the relationship between diet and health. At this time over 100 experiments are going on in this laboratory. In this experiment, the scientists are studying the relationship between the mount of food the mice eat and their health. The mice are in 3 groups. All the 3 groups are receiving the same healthy diet. But the amount of food that each group is receiving is different. The first group is eating I cup of food each day, the second is eating 2 cups, and the third group of mice is eating 3 cups. After 3 years, the healthiest group is the one that is only eating I cup of food each day. The mice in this group are thinner than normal mice. But they are more active. Also they are living longer. Mice usually live for 2 years. Most of the mice in this group are still alive after 3 years. The second group of mice is normal weight. They are healthy, too. They are active, but not as active as the thinner mice. But they are only living about 2 years. The last group of mice spend most of the day eating or sleeping. They are not very active. These mice are living longer than the scientists thought: about a year and a half. But they are not healthy. The experiment is still going on. The scientists hope to finish their studies in 2 years.

According to the passage, what animals are often used by scientists to learn about man？

A．Mice.

B．Rats.

C．Monkeys.

D．All of the above.

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第10题

As for what to do about alien species, the author thinksA．who should make such decisions i

As for what to do about alien species, the author thinks

A．who should make such decisions is open to doubt.

B．the decisions should be based on scientists' conclusions.

C．decision-making should involve more people other than scientists.

D．it is morally unacceptable to eradicate all alien species.

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