粉末加水振摇可产生持久性泡沫的药材为
A.桔梗
B.黄芩
C.胡黄连
D.地黄
E.丹参
参考答案:A
---What are you looking for?
---I’m looking for the book ________ you lent me yesterday.
A. that B. who C. whose
下列适用《著作权法》的是()
A、法律法规
B、时事新闻
C、通用数表
D、地图