15.The most serious problem with nuclear power stations __. A)is the accident at Chernobyl B)is the disposal of their waste C)lies in how much strontium-90 and plutonium-239 are available D)is the negative public reaction against nuclear power

15.The most serious problem with nuclear power stations __.
A)is the accident at Chernobyl
B)is the disposal of their waste
C)lies in how much strontium-90 and plutonium-239 are available
D)is the negative public reaction against nuclear power

出自：英语（专升本）

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