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【判断题】
一切电话中断，双线自动闭塞区间，如闭塞设备作用良好时，仍按自动闭塞法行车。A.
正确
B.
错误
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举一反三
【单选题】A straight wire 20 cm long, carrying a current of 4 A, is in a uniform magnetic field of 0.6 T. What is the force on the wire when it is at an angle of 30° with respect to the field?
A.
0.2 N
B.
0.3 N
C.
0.4 N
D.
0.5 N
【简答题】观看视频后,请把新媒体平台风格营造的具体方法做个总结,写成如下形式 方法1、 方法2、 方法3、 ...
【单选题】—This wall of air is an effective answer to the problem and it ________ work. —But it is a question to put such a wall of air around the statue. [ ]
A.
may
B.
must
C.
should
D.
could
【单选题】以下关于C语言标识符的描述中,正确的是( )
A.
标识符可以由汉字组成
B.
关键字可以作为用户标识符
C.
标识符只能以字母开头
D.
IF可以作为用户定义的合法标识符
【简答题】A．It is a big problem in the management of the city. B．It is a push needed to develop the city. C．It is a cause of disintegration of the city's social structure. D．It is an obstacle to the development...
【单选题】This is an ideal site for a university______ it is far from the downtown area.
A.
provided that
B.
now that
C.
so that
D.
in that
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