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问题
选择题
如下图所示,四个电路图中与实物图对应的是
[ ]
A.
B.
C.
D.
答案
答案:
C
选择题
— I've got to go now.
— Must you? I _____ you could stay for dinner with us.
A. think
B. thought
C. have thought
D. am thinking
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单项选择题
煤炭自燃是在()条件下发生的。
A、无风
B、通风不良
C、通风良好
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