气瓶为什么要漆色?
参考答案:
为了从颜色上迅速辨别出是充装何种气体,同时也为了保护气瓶,防止表面锈蚀。
对于急性肾小球肾炎病人水肿的主要原因,描述正确的是()
A.肾小球滤过率降低
B.肾小管重吸收增加
C.大量血浆蛋白吸收减少
D.继发性醛固酮分泌增多
E.继发性心功能不全
When does a pilot say make all lines fast ? He says it when().
A.the ship is very close to the pier
B.the ship is about to be in position
C.the ship is in position
D.the ship is getting alongside the pier