变压器的变比是()。
A.高、低压绕组的匝数比
B.空载时高、低压侧额定电压之比
C.额定负载时,高、低压侧额定电压之比
参考答案:B
We hope that the measures to control the stock
market, ____ are taken by the government, will work.
A.that
B.where
C.which
D.what
《安全色》(GB2893—2001)的规定,特种劳动防护用品“安全防护”标志为( )
A.红色 B.黄色C.橙色 D.绿色