A Bees genes allow them toexpand their colonies.
B Beesgenes help keep them in their hives.
C Beesgenes make them fly from flower to flower.
D Beesgenes couldexplain the collapse of some colonies.
5. What explanation is given byJerry Hayes to the phenomenon?
A Farmers apply certain chemicals to killunwanted bees.
B The insecticide destroys the honeybees nervous system.
C The insecticide affects the honeybees memory.
D All of theabove.
答案与题解:
1. C 短文第一段的第一句和最后一句告诉我们,昆虫学家正面临一个不可解释的谜。第二句解释了这个谜,给出了答案。
2. A 短文第二段的第一句提供了答案。蜜蜂传播花粉能使植物结果,因此为人类提供食物。
3. B 第四段的开头是It could be thatdisease is causing the disappearance of the bees.第五段的开头是Another cause ofcolony-collapse disorder may be certain chemicals that,这是科学家给出的两个可能造成这种现象的原因。
4. D 第六段的句子:beesgenes could explain why some colonies have coilapsed andothcrs have not。这是选择D的依据。选项A、B、C的内容文章中都没有出现,所以不是答案。
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