单项选择题
Organic chemistry helps to produce materials that are
A.as good as wool.
B.as good as an insect's body.
C.not as good as natural materials.
D.better than natural materials.
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单项选择题
According to the passage, the science of the future is likely to be
A.electronics.
B.biotechnology.
C.genetic engineering.
D.nuclear technology.
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单项选择题
In 1996, Arthur C. Clarke predicted that
A.biological power sources would be put into use soon.
B.oil, gas and coal could be repeatedly used in the future.
C.dependence on non-renewable power sources would be reduced soon.
D.the Chernobyl disaster would happen in two years.
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