治疗肺炎链球菌肺炎首选的抗菌药物是（）
A.氧氟沙星
B.红霉素
C.青霉素
D.链霉素
E.环丙沙星
参考答案：C
She is very dear to us. We have been prepared to do _____ it takes to save her life. [ ]
A. whichever
B. however
C. whatever
D. whoever
下列各项中，不属于一次性原始凭证的是( )。
A．收料单
B．领料单
C．耗用材料汇总表
D．发货票
