穿着电绝缘服必须另配耐电等级相同或高于电绝缘服的电绝缘手套和电绝缘鞋。
参考答案：对
润滑系统中润滑油的杂质含量应小于（）。
It’s already 6 o’clock now. Don’t you think it’s about time _____? [ ]
A. we are going home
B. we go home
C. we went home
D. we had gone home
