车站一切电话中断时,单线行车按书面联络法,双线行车按时间间隔法。列车进入区间的行车凭

题型:单项选择题

问题:

车站一切电话中断时,单线行车按书面联络法,双线行车按时间间隔法。列车进入区间的行车凭证均为()。

A.路票

B.调度命令

C.红色许可证

考点:电力机车司机考试电力机车司机考试题库
题型:单项选择题

抛物线x2=4y的准线方程是(  )

A.x=1

B.x=-1

C.y=1

D.y=-1

题型:单项选择题

细胞的生物电现象中,“当静息电位数值向膜内负值加大的方向变化时”称为()

A.复极化

B.膜的极化

C.静息电位

D.膜的超级化

E.去极化或除极

题型:单项选择题

用恰当的词语填空,完成对话, 每空一词。

A:Excuse me,may I smoke here?

B:Look at the sign, please. It says"No Smoking".

A:Would you 1._________________ my smoking in the office next door?

B:I'm afraid not. A11 the offices are non-smoking areas.

A:Oh, dear ! 2. ________________can I smoke,then?

B:There is a smoking room3. _______________ the first floor. You may smoke there.

A:Sorry,I'm 4_______________here. Could you please show me the way?

B:Sure. Follow me,please. I'm afraid smoking is bad for your health. You'd better

5. _________________it up.

A:Thanks for your advice. I'll think about it.

题型:单项选择题

研磨锥面密封的阀门阀座时,其密封面接触宽度应按阀门()大小来确定,一般钢件为()毫米。

题型:单项选择题

律师在侦查阶段为犯罪嫌疑人提供法律帮助的职责有哪些?

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