利用()拨杆段时,应防止滑脱伤人。
A.棍
B.撬杠
C.抱杆
D.装载机
参考答案:A, B
How big is the house he moved in
A.As big as the old one.
B.Twice as big as mine.
C.As big as mine.
D.Twice bigger than mine.
汽包锅炉和直流炉整体布置采用最多的是()。
A.T型
B.塔型
C.H型
D.Π型