采用变位齿轮相啮合可以配凑中心距。( )
参考答案:对
电解CuCl2溶液时,如果阴极上有1.6gCu析出,则阳极上产气体的体积(标况)约为
A.0.28L
B.0.56L
C.0.14L
D.11.2L
I'd like to find some information about the Great Wall. Could you teach me ______ to search the Internet. [ ]
A. how
B. when
C. where
D. what