黄连解毒汤中的使药是()
A.黄连
B.栀子
C.黄柏
D.黄芩
E.黄连、黄芩
参考答案:B
简谐振动三要素是()、振幅、()。
We make it a rule that each of us _________ the bedroom one day a week.[ ]
A. has cleaned
B. have cleaned
C. cleans
D. clean