配产配注是为使注水开发的油田保持地下流动处于合理状态。
参考答案:对
— Who teaches ______ English?
— No one. I teach ______. [ ]
A. you; myself
B. your; myself
C. you; me
室内空气中苯测定时,应采集约()L空气。
A.5
B.10
C.15
D.20