属于四环三萜皂苷元结构的是（）
A．螺旋甾烷
B．羊毛脂甾烷
C．达玛烷
D．羽扇豆烷
E．β-香树脂烷
参考答案：B, C
—Did Mr White tell you _______?
—Yes. He said he went there in 2003. [ ]
A. when he traveled to Tibet
B. how he goes to Wuhan
C. where he spent his holidays
D. why did he visit Kunming
槐花散含有的药物是（）
A.荆芥炭
B.生地黄
C.地榆
D.陈皮
E.枳实
