下列凉血止血药中还具有化痰止咳功效的中药是（）
A.小蓟
B.小蓟
C.侧柏叶
D.槐花
E.地榆
参考答案：C
—Why did Miss Wang look so worried when we saw her?
—Because she wondered ________. [ ]
A. where did the other students go
B. when would the policeman come
C. what her students have done during the trip
D. if her students had survived the earthquake
表面振动压实仪法测定粗粒土和巨粒土的最大干密度，试样分（）层振动压实。
A.1
B.2
C.3
D.4
