—There is nothing worthy        in today's newspaper.

—It must have disappointed you, I think.

A．reading

B．to read

C．being read

D．to be read

格拉布斯准则是根据顺序通缉令的某种分布规律提出的一种判别（）的准则。

A、微笑误差

B、系统误差

C、随机误差

D、粗大误差