根据忌装原则，水泥和铵盐的最低配装要求（）。
A．不可同室
B．不可同舱
C．可以同室
D．不可相邻
参考答案：A
A．(A) It was predicted that I would be the Guest of Honour at the Show.
B．(B) I had to wait for 20 years before I was invited to the Show.
C．(C) I didn’t expect that I would be the Guest of Honour at the Show.
D．(D) I suspected that I would be given a leading role in the movie.
在绝缘基板覆铜箔两面制成印制导线的印制板称为（）。
A.单面印制电路板
B.双面印制电路板
C.多层印制电路板
