开关柜设备在扩建时,必须考虑与原有开关柜的一致性。()
参考答案:对
–There is _______ on using mobile phones at the gas station.
--Do you mean talking on the mobile phone ________ at the gas station?
A.a ban; is banned
B.ban; banned
C.a ban; banned
D.ban; is banned
在假设检验中,通常用来表示统计检验力(power of test)的是( )
A.1-α
B.1-β
C.α+β
D.α-β