Though the blacks in the United states have been fighting for equal rights ____ the whites for many

years, they _____ won the battle.  [ ]

A. to; still haven't  

B. to; haven't still  

C. with; still haven't  

D. with; haven't  still

分析方法的重复性

A．回收率
B．相对标准偏差
C．线性关系
D．熔点
E．pH值