I feel it is you as well as your wife that       for your son’s bad performance at school.

A．are to blame

B．is going to blame

C．are to be blamed

D．is to be blamed

在捞油井捞油时，捞油泵到达液面时的深度通过捞油车上的（）判断。

A、计深仪

B、张力仪

C、显示屏

D、感应器