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【单选题】
无人机在遥控下降时，驾驶员应注意A.
A．飞机下降时，油门收小，螺旋桨扭转气流减弱，飞机有右偏趋势，须抵住左舵
B.
飞机下降时，油门收小，螺旋桨扭转气流减弱，飞机有左偏趋势，须抵住右舵
C.
C．飞机状态不会发生变化，不需做任何准备
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【简答题】The roads have to be ______ (wide) so that the problems of traffic jam can be solved.
【单选题】Passage 1Traffic jam and cities, it seems, go hand in hand. Everyone complains about being stuck in traffic; but, like the weather, no one seems to do anything about it. In particular, traffic enginee...
A.
traffic jam and weather are the two factors preventing the development of the big city
B.
traffic jam seems to be very difficult to deal with
C.
if traffic engineers try their best, traffic jam can be solved
D.
public officials are always criticized for misusing their power
【简答题】图 的完全关联矩阵为___________________。
【简答题】证明：设图G有n个结点，r个最大连通子图，则图G的完全关联矩阵的秩为n-r．
【单选题】Passage 1Traffic jam and cities, it seems, go hand in hand. Everyone complains about being stuck in traffic; but, like the weather, no one seems to do anything about it. In particular, traffic enginee...
A.
California is as crowded and successful as San Francisco.
B.
The traffic jam in San Francisco has resulted in the capital becoming empty.
C.
The traffic jam level in Jakarta is lower than that in the US.
D.
Traffic jam has caused terrible bad effects in cities such as Bangkok and Lagos.
【单选题】Passage 1Traffic jam and cities, it seems, go hand in hand. Everyone complains about being stuck in traffic; but, like the weather, no one seems to do anything about it. In particular, traffic enginee...
A.
In cities, traffic jam is unavoidable.
B.
Traffic jam is both a sign of failure and a sign of success.
C.
Traffic jam is the consequence of successful cities.
D.
For a successful city, traffic jam is not unpreventable.
【单选题】It is reported that China is developing ________ emergency plan to solve ________ traffic jam crisis in Beijing. [ ]
A.
the; the
B.
an; /
C.
an; the
D.
/; the
【单选题】What kind of problem are they having?
A.
A traffic jam.
B.
A paper jam.
C.
A broken LCD display.
D.
They are late for the meeting.
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