[简答题]

The scientists, (concerned about) the potential hazards, wanted (the latest) research finding (made) (publicly).
A. concerned about
B. the latest
C. made
D. publicly

[填空题]The scientists, (concerned about) the potential hazards, wanted (the latest) research finding (made) (publicly). A. concerned about B. the latest C. made D. publicly

[填空题]The scientists, concerned about the potential hazards, wanted the latest research finding made publicly.

• A. concerned about
• B. the latest
• C. made
• D. publicly

[填空题]Scientists are growing concerned about other gases produced from ______.

[单项选择]Over the centuries, scientists have been trying hard to find satisfactory substitutes for precious stones but failed many times.
Many years ago, a chemist surprised the world by saying: It should be possible to make a precious stone that not only looks like the real thing, but that is the real thing. The only difference should be that one crystal would be made by man, the other by nature.
At first this did not seem like a particularly hard task. Scientists began to try making synthetic diamonds towards the end of the eighteenth century and discovered a key scientific fact: diamonds are a form of carbon, which is a very common element.
Then, why not change a cheap and plentiful substance, carbon, into a rare and expensive one, diamond This change takes place in nature, so it should be possible to make it happen in the laboratory.
It should be possible, but for 150 years every effort failed though several people believed that they had solved the diamond riddle
A. it is a real thing that man was able to make a precious stone as nature can do.
B. man should be able to make a precious stone that is exactly the same as a natural one.
C. there is only a little difference between a man-made crystal and a nature-made one.
D. scientists expect a small difference between a man-made crystal and a nature-made one.

[填空题]As far as cleaning up a spill is concerned, the hardest job is taking care of the______pollution.

[填空题]Scientists gather information about climate systems and use this information to ______.

[判断题]

Scientists know more about competing theories of uncertainty, so they are closer to solving a problem.

[填空题]Today scientists know something about the causes of earthquakes.

[单项选择]

One day two scientists were quarrelling about whose watch was better, the German one or the Japanese one. Since they were scientists, they decided to do an experiment to test the watches. They went into their lab and filled a basin with water, put the watches in, waited for 20 minutes and took them out.
They could see there was something wrong with both watches. They observed them for several hours before speaking to each other. They both silently found that the German watch was losing 60 minutes and the Japanese are doubled that.
The scientist with the Japanese watch then slowly raised his head and said, "Both watch are out of work, but my watch is right more often than yours, so it’s better." The scientist with the German watch went home without saying a word.

After putting the Japanese watch in water for 20 minutes, two scientists found（）
A. it was a good watch
B. it went forward
C. it went faster than the German one
D. it went backwards 120 minutes