—I’ll talk to my son Bill about it as soon as possible． He usually listens．

—We need _______ listening． We need action．

A．more than

B．less than

C．not more than

D．no more than

开展室内质控前的准备工作（）

A.培训实验室工作人员

B.建立标准操作规程

C.选用较理想的质控品

D.质控品的正确使用与保存

E.选择质控规则