题目内容

Although he wasn’t a mechanic himself, he had _____________ quite a bit of knowledge about cars and how they worked simply from watching his father work in the auto shop.

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After a lot of hard work, she _________ her dream of being able to speak 7 languages.

因为我国铁路采用左侧行车制，机车司机座位统一设在驾驶室左侧，为便于嘹望信号，规定固定信号机应设置在行车方向线路的左侧。

A. 对
B. 错

进站信号机用于防护区间。

A. 对
B. 错

出站信号机其允许显示作为列车占用区间的凭证，指示列车能否由车站进入区间。

A. 对
B. 错