Was it not until you began to work _______ how much time you had wasted? [ ]

A. that you realized

B. did you realize

C. did you not realize

D. that you didn't realize

在质量控制中，低、中、高3个质控样品，其中3个偏离靶值超过1s，但在不同方向时，提示()

A．该批测定结果可以用

B．质控样品放置位置不正确

C．视具体情况而定

D．该批样品需要重新测定

E．如果下次分析仍是这样则需重新测定