相关考题
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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 -
单项选择题
Renew a cargo runner, please. （）
A.fall
B.stay
C.guy
D.sling
