当带电体有接地故障时,()可作为防护跨步电压的基本安全用具。
A.低压试电笔
B.绝缘鞋
C.标志牌
D.临时遮栏
参考答案:B
用所给词的适当形式填空。
1. This dog is very _____(love) and I like it very much.
2. Who does _____(good) in English, John or Mike?
3. I hope to spend two hours _____(play) softball with him.
4. Students can have______ (drive) lessons in American schools .
5. At the_____ (begin) of the trip, most of us felt bored.
6. My mother always cooks _____(taste) meals on Sunday.
7. It rained heavily yesterday, so my father (drive) me to school.
8. The girls finished their work all by_____(them).
9. Yesterday we had a good time _____(chat)with each other.
10. I plan _ ( go ) to Beijing for summer holiday next year .
以下()不属于BI外部行为设计的内容。
A.标志设计
B.市场调研
C.服务水平
D.公关行为