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thereareproblemswithnuclearenergythattheyhaveyetA.tosolveB.tobesolvedC.beensolvedD.beisolvedng
题目详情
there are problems with nuclear energy that they have yet________
A.to solve
B.to be solved
C.been solved
D.beisolvedng
A.to solve
B.to be solved
C.been solved
D.beisolvedng
▼优质解答
答案和解析
B 表示尚未解决的
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