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.
45. What do we learn from the last paragraph?
A Biotechnology can solve all our future energy problems.
B Biological power is cheaper than nuclear power.
C Biological power may not be as dangerous as nuclear power
D Biological power will keep all its promises.
参考答案:B C D A C
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