当发现开发效果不够好时,对分注合采的区块增加()。
A、注水井
B、注聚井
C、采油井
D、电泵井
参考答案:C
I like English very much. I never miss a ______ to practice English with foreigners.
A.mistake
B. subject
C. chance
D. space
涉外仲裁委员会可以由()设立。