某女，53岁。体重50Kg。急性肾功能衰竭多尿期，厌食，恶心，呕吐，脉压变小，血压下

如图，甲为常见的高音喇叭和医用听诊器，将它们制成这种形状，是为了减小声音的散失从而增大 ______；而在有些地方可以看到乙图所示的标牌，它的意思是 ______，从而达到减弱噪声的目的．

"You'll have to wait for two hours, _____ is, at about 11:30, _____ the medical report will come out,"

the doctor said to me. [ ]

A. that; when

B. which; that

C. that; which

D. it; whose

工程建设项目的质量等级是根据单位工程的优良率评定的。( )

肿瘤的发生多与下列哪三脏关系密切()

A.肝、心、肾 

B.肺、肝、肾 

C.肺、心、脾 

D.肝、脾、肺 

E.脾、肾、肝 

铁路危险货物承运人是指办理危险货物运输的（）。