在合同规定以信用证付款的条件下，谁负有申请开立信用证的义务（）。
A.卖方
B.买方
C.开证行
D.议付行
参考答案：B
The majority of visitors _____ in favor of his conclusion that the number of books published on the subject _____ simply surprising.
A．were; was
B．was; was
C．were; were
D．was; were
祖国医学认为痤疮的病因多是
A．外感风热
B．肺经风热
C．过食辛辣油腻之物
D．肾阴亏虚
