高炉铁口数目的多少主要取决于产量、两次铁间渣铁沟维护和()。
A、铁水罐容量
B、出渣出铁时间
C、炉前工人多少
参考答案:B
I ______ that there ______an evening party on Saturday evening. [ ]
A. thank; was
B. guess; will be
C. thought; is
D. guessed; is going to be
低压断路器的选用原则中,热脱扣器的整定电流()所控制的负载的额定电流。
A.小于
B.等于
C.大于
D.不小于