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【单选题】
容许信号显示一个蓝色灯光,准许列车在通过信号机显示红色灯光的情况下不停车,以不超过( )的速度通过,运行到次一通过信号机,并随时准备停车。
A.
30km/h
B.
20km/h
C.
15km/h
D.
10km/h
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A.
before the Middle Ages
B.
around the 19th century
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in Greece or Rome
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【判断题】Z6~66.测量线圈的电感量,应选用交流电桥。
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【单选题】HTTP response status code for Bad Request is ( ).
A.
200
B.
400
C.
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D.
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【单选题】The major problems with America's railroad system in the mid 19th century lay in______.
A.
poor quality rails and unreliable stopping systems
B.
lack of financial support for development
C.
limited railroad lines
D.
lack of a transcontinental railroad
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【单选题】By the mid-1980s, farmers in Denmark ______.
A.
used 50 per cent less fertiliser than Dutch farmers.
B.
used twice as much fertiliser as they had in 1960.
C.
applied fertiliser much more frequently than in 1960.
D.
more than doubled the amount of pesticide they used in just 3 years.
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【简答题】HTTP response status codes 301() 505()
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【单选题】Quills were the chief writing tool until the _______ of steel pens in the mid 19th century.
A.
advent
B.
adventure
C.
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D.
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【单选题】The major problems with America's railroad system in the mid 19th century lay in ______.
A.
limited railroad lines
B.
lack of a transcontinental railroad
C.
lack of financial support of development
D.
poor quality rails and unreliable stopping systems
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limited railroad lines
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