二氯四氟乙烷

Such a fierce dog __ that we had to wait outside before we could get into his yard．

A．has he had

B．did he have

C．he had

D．he has had

持卡人投诉有关ＡＴＭ交易，受理单位应（）在个工作日内将客户投诉表和投诉交易日ＡＴＭ日志（复印件）上送差错处理部门处理。(三级)

A、１   

B、２ 

C、３   

D、４

影响当前我国物流市场需求的环境因素有哪些？

四物汤与归脾汤中共有的药物是（）

A.人参

B.酸枣仁

C.当归

D.甘草

E.白芍

尿路感染最常见的致病菌是______

A．变形杆菌
B．绿胺杆菌
C．大肠杆菌
D．粪链球菌