引起肾病性水肿的直接原因是（）。
A.肾小球滤过率明显减少
B.醛固酮增多
C.抗利尿激素增多
D.利钠激素下降
E.肾小球基底膜的通透性升高
参考答案：E
下列工厂之间存在工序上联系的工业是（ ）
A．皮革厂、纺织厂
B．炼铁厂、炼钢厂
C．化工厂、电镀厂
D．糕点厂、家具厂
Most of the students feel nervous when they are reminded that it will be about half a year ____ they take
the national college entrance examination. [ ]
A. since
B. that
C. before
D. until
