妊娠高血压综合征基本病理改变是（）
A.肾小球滤过率降低
B.全身小动脉痉挛
C.胎盘绒毛退行性变
D.水钠潴留
E.弥散性血管内凝血
参考答案：B
—Could you tell me ?
—Sure. Just go straight and turn left. You can see it on your right. [ ]
A. how I can get to the library
B. where can I find the library
C. how can I get to the library
D. where can I find the library
井漏的主要原因是井眼内的液柱压力（）地层压力。
A.小于
B.大于
C.等于
D.降到了
