He looked very confident and calm during the test, but         he was extremely nervous.

A．in trouble

B．in danger

C．in reality

D．in surprise

肾病综合征水肿的发病机制是( )

A．肾小球毛细血管通透性增加
B．肾小球滤过率下降
C．血浆胶体渗透压下降
D．醛固酮分泌增加
E．抗利尿激素分泌增加