It makes no difference __________.

A．whether will you come tomorrow.

B．Whether or not will be pass the exam

C．If he will come to the meeting or not

D．Whether he will come to the meeting or not

在正常工作条件下，电击防护利用遮拦和外护物的安全防护，要求人能触及的各种电压等级的导体或导电部分的距离必须大于（）范围。

A、防护

B、可靠

C、伸臂

D、身高