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【单选题】
组合式曲轴发生红套,其主要原因是______。A.
柴油机轴承中心线变形
B.
曲轴承受巨大冲击性扭矩
C.
转速变化
D.
柴油机操作顺序不妥
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皮皮学刷刷变学霸
举一反三
【单选题】The plane was about to take _____, and yet I left my ticket behind.
A.
with
B.
off
C.
by
D.
in
【单选题】肛管排气时，肛管插入深度及保留肛管时间
A.
10～15cm，20min
B.
15～18cm，20min
C.
10～15cm，30min
D.
15～18cm，30min
【单选题】The air hostess (空中小姐) _____ the passengers to fasten their seat belts when the plane was about to land.
A.
remembered
B.
replied
C.
reminded
D.
questioned
【简答题】肛管排气时，肛管插入直肠深度为
【单选题】What did the pilot say to the passengers when the plane was about to make a forced landing?
A.
Brace for impact.
B.
Landing gear's ready.
C.
Keep calm and we are about to land.
D.
God bless us all.
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