既能清肺热，可治疗肺热咳嗽，又能泻胃火，治疗胃火牙痛的药物是（）
A.知母
B.竹叶
C.芦根
D.栀子
E.石膏
参考答案：E
---- Tom, did Mr. Li join you in your discussion?
---- No, he _____, but he happened to have fallen ill.
A．would like to
B．will
C．was to have
D．was going to join
基金合同成立的前提是投资人缴纳基金份额认购款项。( )
