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问题
单项选择题
坝面作业中,砂的干密度的测定可用体积为( )的环刀测定。
A.300cm
3
B.400cm
3
C.500cm
3
D.600cm
3
答案
参考答案:C
选择题
— What's your plan for the summer holidays?
— I've no idea, but I've decided ______ at home and have a good rest first.
A. stay
B. to stay
C. stayed
D. staying
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名词解释
骨膜
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