潜水泵应（）测定一次电动机离子绕组绝缘电阻值。
A.每天
B.每周
C.每月
D.每季
参考答案：B
— Her father is very rich.
—________ She wouldn’t accept his help even if it were offered.
A．What for?
B．So what?
C．No doubt.
D．No wonder.
对重要的进口商品和( )，收货人应当依据对外贸易合同约定在出口国装运前进行预检验、监造或者监装。
A．重要设备
B．大型设备
C．大型成套设备
D．贵重设备
