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NO.40
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正确率：70%
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题目来源 : 填空经典1500题
Select one entry for the blank. Fill the blank in the way that best completes the text.

Though the volume of radioactive waste produced by nuclear power plants is _____, the problem of how to dispose of that waste is not: rather, it is of major importance. 

unmanageable
troubling
significant
small
deceptive

Select one answer choice.

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