紧固电极连接件时所用的工具要带有（），应避免蓄电池组短路。
A.绝缘夹钳
B.绝缘护套
C.绝缘手柄
D.绝缘隔板
参考答案：C
按要求改写句子。
1.The students have no classes on Sunday. (改为反意疑问句)
_______________________________________________________?
2. Is your son showing his friends the photos now? (用often代替now)
3. Would you like juice or coffee? (改为同义句)
_______________________________________________________？
4. What does your mother want you to do? (用make cakes作答)
_______________________________________________________.
开挖一般土质10m支线杆杆坑质量标准，深度允许偏差为、浅（）mm。
A、20
B、40
C、30
D、50
