制动器线圈的控制电路,至少用()个独立的触点串连控制。
A.1
B.2
C.3
D.4
参考答案:B
—Were all the passengers on the bus injured in the accident?
—No,______ only the four who got hurt.
A.there was
B.there were
C.that was
D.it was
酒炙时,一般每100公斤药物,用黄酒()
A、5-10公斤
B、10-20公斤
C、10公斤
D、25公斤
E、25-30公斤