急性肾小球肾炎产生全身性水肿的主要机制是()
A.醛固酮分泌增加
B.抗利尿素释放增多
C.肾小球钠水滤过下降
D.肾小球毛细血管通透性升高
E.血浆胶体渗透压减低
参考答案:C
CATEGORY A EPIRB’s transmit on frequencies that are monitored by().
A.orbiting satellites in space
B.commercial radio stations
C.private,commercial,and military aircraft
D.ordinary radio stations
饱和盐水的比重是1.20,Cl-浓度是190000mg/l,若用ppm表示,浓度应为:()。
A.190000
B.158333
C.228000
D.300000