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【单选题】
读“我国某山区公路规划线路设计图”，回答下面问题。 图中公路沿线甲、乙、丙、中，海拔最高点出现在（）A.
甲
B.
乙
C.
丙
D.
丁
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反馈参考答案：
举一反三
【单选题】A car accident happened on the highway because of the heavy fog, but no one got seriously injured.
A.
sadly
B.
luckily
C.
hopefully
D.
unfortunately
【单选题】So far hundreds of flights ____ because of the heavy fog .
A.
are canceled
B.
will be canceled
C.
were canceled
D.
have been canceled
【简答题】单位脉冲函数 的拉氏变换式是( ); 单位阶跃函数 的拉氏变换式是( ); 单位斜坡函数t的拉氏变换式是( ); 单位斜坡函数 的拉氏变换式是( );
【单选题】We were stuck at the airport because of the heavy fog, otherwise we ________ here in time for the conference.
A.
arrived
B.
had arrived
C.
would arrive
D.
would have arrived
【单选题】All flights ______because of the heavy fog, we had to decide to take the train.
A.
were canceled
B.
having canceled
C.
having been canceled
D.
have been canceled
【单选题】Because of the heavy fog, the TV tower was . [ ]
A.
in sight
B.
lost sight
C.
disappeared
D.
out of sight
【单选题】—Attention, please. The plane has to be put ______ because of the heavy fog. —Oh, bad luck! We have to wait now.
A.
on
B.
away
C.
up
D.
off
【简答题】阅读 We regret to inform you that the flight has been delayed because of heavy fog.
【单选题】The flight to New York was ________ because of the heavy fog.
A.
put off
B.
put away
C.
put out
D.
put up
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