采用抽油机井生产有两种情况,一是因为自喷井能量下降而转抽的;二是油井投产时因能量(),直接安装抽油机井采油的。
A、较低
B、较高
C、下降
D、上升
参考答案:A
As a result of the serious flood, two-thirds of the buildings in the area _____ . [ ]
A. need repairing
B. needs to repair
C. needs repairing
D. need to repair
建立个人信用记录需要申请吗?