题目内容

轨道的三大薄弱环节是道岔、曲线和钢轨接头。

A. 对
B. 错

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正线、辅助线、基地线及专用线均属行车调度员管理。

A. 对
B. 错

One of the most popular sports is jogging, which can be done at any time anywhere and does not even need any special equipment.

有些人说他们没有从事业余爱好的时间。

Skydiving does not belong in the category of popular habbies.