抽油机井示功图下理论负荷线代表（）。
A、杆柱重
B、液柱重
C、冲程
D、冲次
参考答案：A
用所给单词的适当形式填空。
1. Mr Lee _____ (not like)it at all.
2. Excuse me, could I _____ (sit) here?
3. My family _____ (move) to Beijing three years ago.
4. You must _____ (quiet) in the library.
5. Mary _____ (be)a teacher at Beijing International School now.
供电营业所对农村专职电工工作质量考核的内容标准是：（）
A.电力客户动力电能表实抄率98%
B.居民电能表实抄率≧98%
C.抄表差错率≦0.2%
D.全年低压电力客户用电检查率98%
