移动通信基站联合接地装臵的接地电阻值应小于5欧,万线以上交换局联合接地装臵的接地电阻值应小于()欧。
A.2
B.3
C.1
D.5
参考答案:C
根据所给提示,完成句型转换。每空一词,含缩略词。
1. My father likes to watch basketball matches on TV. (改为否定句)
My father _______ _______ to watch basketball matches on TV.
2. I collect toys because they are beautiful. (对划线部分提问)
_______ _______ you collect toys?
3. Students can't take magazines out of the reading-room. (改为被动语态)
Magazines can't _______ _______ out of the reading-room by students.
4. Mike is 14 years old. David is 12 years old. (合并为一句)
Mike is 2 years _______ ________ David.
5. Alice didn't know how she could draw horses well. (改为同义句)
Alice didn't know how ________ _______ horses well.
6. I wondered what I should do next. (改为同义句)
I wondered what _______ ________ next.
污染不严重时,采用()冲洗运转,可在其中加4%的冲洗添加剂,运转1~2h后,采样分析合格,再用工作油或同一粘度级的油,进行冲洗运转一次。
A.油
B.工作油
C.同粘度级的油
D.水