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问题 单项选择题

高柱信号机距离正线及通行超限列车的线路中心线最小距离为（）mm。

A.1850

B.2440

C.1750

D.1900

答案

参考答案：B

选择题
Shortly after suffering from a massive earthquake and ________to ruins，the city took on a new look.
A．reducingB．reduced
C．being reducedD．having reduced
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单项选择题

从坑口挖出的土方在堆放地方，至少要距离坑口（）米。

A、0.8

B、0.6

C、0.5

D、0.3
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