压缩机返回气量增大,第一萃取塔塔底1,3-丁二烯浓度()。
A、降低
B、增高
C、不变化
D、有高有低
参考答案:B
The settlement is home to nearly 1,000 people, _____ left their village homes for a better life in the city.
A.many of those
B.many of which
C.many of them
D.many of whom
男性,70岁,进行性排尿困难5年,尿潴留留置导尿4次,1年前曾测残余尿量100ml。查体:下腹膨胀,浊音界在脐下2指,右侧腹股沟区有一包块,肿块突入阴囊可以还纳。
该患者的主要诊断是()
A. * * 狭窄
B.腹股沟疝
C.膀胱结石
D.前列腺增生
E.神经源性膀胱功能障碍