当客舱灯光选择在DIM2时，是全亮时的百分之几？（）
A.0%
B.10%
C.50%
D.100%
参考答案：B
It _____ that scientists have found the reason _____ Edison was clever.[ ]
A. said, that
B. said, why
C. is said, that
D. is said, why
患者，男，70岁。心气不足，脉结代，心动悸。首选药物是（）
A.党参
B.黄芪
C.山药
D.白术
E.甘草
