验电与接地应由两人进行，其中一人应为监护人。进行高压验电应戴

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问题单项选择题

验电与接地应由两人进行，其中一人应为监护人。进行高压验电应戴（）、穿绝缘鞋。

A.安全帽

B.安全带

C.护目镜

D.绝缘手套

答案

参考答案：D

选择题

_______, her hands shook constantly and violently.

A．Knowing her son killed in the mine

B．When she knew her son was killed in the mine

C．Known her son killed in the mine

D．She knew her son killed in the mine

问答题简答题

请列举出4G全国套餐的套餐特点。