属于上海的机场代码有()。
A.WNZ
B.SUD
C.PVG
D.SHA
参考答案:C, D
Although they wanted to keep it quiet, news of the job loses ________ very quickly.
A.got by
B.got out
C.got over
D.got off
液压电梯紧急下降手动操作装置,在操作时必须有持续的()来保持其动作状态。
A、电力
B、液压力
C、人力
D、机械力