相关考题
-
单项选择题
（）we swing the port derrick inboard?
A.Shall
B.Are
C.Is
D.Be -
单项选择题
（）is the rate of discharging here?
A.When
B.Why
C.What
D.Either A or B -
单项选择题
The （）of the derrick is out of order.
A.black
B.back
C.block
D.broken
