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【多选题】
关于投影面垂直线，以下哪个叙述是正确的？A.
仅垂直于一个投影面
B.
平行于两个投影面
C.
仅平行于一个投影面
D.
倾斜于一个投影面
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反馈参考答案：
举一反三
【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】测量表面粗糙度时,规定取样长度的目的是为了限制和减弱 对测量结果的影响。
【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.
【简答题】Traffic 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 engineers, trans...
【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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