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【多选题】
活塞式制冷压缩机的机体主要有 和 两部分组成。A.
气缸盖
B.
气缸体
C.
曲轴箱
D.
曲轴箱侧盖
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皮皮学刷刷变学霸
举一反三
【单选题】I _____ to telephone you last night, but the line was out of order and I couldn’t get through.
A.
succeeded
B.
tried
C.
managed
D.
failed
【简答题】A: You (telephone) for ages. You not nearly (finish)? B: I (not get) through yet. I (try) to get our Paris office but the line (be) engaged all morning.
【简答题】I think there's________wrong with their telephone. The line is engaged all the time.
【单选题】I _______ to telephone a friend in New York for the last two hours but the line is still engaged.
A.
tried
B.
have been trying
C.
had been trying
D.
had tried
【简答题】根据下列选项，回答 115～116 题： 第 115 题 位于第1掌骨中点桡侧，赤白肉际处的腧穴是（ ）
【单选题】— I can’t get through to the general manager’s office. — The line is busy. Someone ______ the telephone.
A.
must use
B.
uses
C.
must have been using
D.
must be using
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