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According to the opponents of nuclear energy, nuclear energy is________________.

A.primitive
B.cheap
C.exhaustible
D.unsafe


【参考答案】

D
首段末句提到，核能反对者认为核电站不仅对环境，而且对公民自由都是一种直接的威胁，即核能不安全，D正确。B是支......

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