What can be inferred from the last paragraph?
[A] Whether or not to have a nucleus is important in biology.
[B ] The speaker will tell us how to distinguish bacteria tomorrow.
[ C] Evolution will be the main topic of the program next time.
[ D] Eukaryotes develop from prokaryotes.
第2题
[A] fired
[B] glowed
[C] manipulated
[D] bestowed
第3题
According to the passage, why does the cancer increase?
[A] Because people expose too much to the computer.
[B] Because people don't care about the low levels of radiation.
[C] Because the cells are killed by radiation.
[D] Because the cells produce themselves in an unusual way.
第4题
ions 17-20.
17. Why does the speaker say that radiation is similar to radio waves?
[A] Because both of them can be detected by human senses.
[B] Because both of them can be sensed by a radio receiver.
[C] Because both of them are harmful.
[D] Because both of them can only be detected by devices.
第5题
What can be inferred from the passage?
[A] 11 percent of boys in America smoke before their fourth grade.
[B] Nicotine is a part of cigarette.
[C] Children form. values in the fourth grade.
[D] Parents who cannot stop smoking should force their children to stay away from it.
第6题
Why should children be educated about the harm of smoking at an early age?
[A] Because small children are more curious about cigarettes.
[B] Because smoking is difficult to give up for children.
[C] Because the early age is the time to form. values.
[D] Because children's health is more venerable to the hurt of cigarette.
第7题
What is the meaning of " axiom" in the first sentence of the second paragraph?
[A] connection
[B] principle
[C] method
[D] circumstance
第10题
How does the author feel about the President's request for the extension and its coverage?
[ A] Short of vision.
[ B ] Late and incomplete.
[ C] Lacking in consistency.
[ D] Exhaustive but ineffective.
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