对联系较弱的,易发生振荡的环形线路,应加装三相重合闸,对联系较强的线路应加装单相重合闸。
参考答案:错
根据汉语及首字母提示完成单词。
1. —Would you m_______ turning off the CD player? —Not at all.
2. My watch doesn't w_______ There's something wrong with it.
3. —Could you help me w_______ my English? —Sure.
4. As a student, we should obey the rules and mustn't b_______ the rules.
5. Jack bad a bad cold and he c_______ a lot.
6. —What's h_______ there? —An accident.
7. The girl preferred swimming to s_______ (唱歌).
8. Nothing is difficult in the world if you set your m_______ to do it.
9. Please take a _______ the dirty clothes and bring me the clean coat.
10.Don't spit in p_______ It's impolite and isn't good for the environment. .
我国乙型肝炎免疫策略中的主要免疫对象是()。
A.学龄儿童
B.青少年
C.母亲HBsAg阳性儿童
D.乙肝高危人群
E.全部新生儿