控制图是根据真实检验的原理构造出来的一种图，用于监测生产过程是否处于控制状态。( )
参考答案：错
治疗心气亏虚、心悸、健忘者，最宜选用的药物是（）
A.人参
B.西洋参
C.太子参
D.党参
E.丹参
The journey around the world took the old sailor nine months, _____ the sailing time was 226 days. [ ]
A. of which
B. during which
C. from which
D. for which
