汽轮发电机大轴上安装接地碳刷是为了消除（）对地的（）用的。
参考答案：大轴；静电电压
---I’m sorry to hear that the swimmer drove again after drinking and hurt seriously.
--- It’s too dangerous. The traffic accident was a really _______to him.
A．game
B．lesson
C．skill
D．pleasure
汽车的最大爬坡能力是指在良好路面上（）。
A.一挡.空载时最大爬坡度
B.直接挡最大爬坡度
C.最高车速时的爬坡度
D.满载一档最大爬坡度
