电捕焦油器的馈电箱和绝缘箱起什么作用?
参考答案:
馈电箱的作用是引入高压电源,使高压电缆与电晕线相连。绝缘箱的作用是起高压电绝缘作用,吊起固定吊架作用,便于电晕极的安装。
________ in what he was reading, he didn’t see me before he almost knocked me down.
A.Absorbing
B.To be absorbed
C.Absorbed
D.Having absorbed
从甲地到乙地王明要走12分钟,李力要走15分钟,王明和李力速度的最简比是______.