________to train his daughter in English, he put an ad like this in the paper "________, an English

teacher for a tenyearold girl". [ ]

A. Determined; Wanted  

B. Determined; Wanting

C. Determine; Wanted  

D. Determining; Wanting

试验系统区分试样中两个相距很近的缺陷信号的能力叫做（）.

A.动态范围；

B.灵敏度；

C.线性；

D.缺陷分辩力.