妊娠期高血压疾病基本病理生理变化是（）
A.肝被膜下出血
B.水钠潴留
C.全身小血管痉挛
D.胎盘绒毛退行性变
E.DIC
参考答案：C
—What happened _______ you? You don't look fine.
—I have a cold.[ ]
A. in
B. on
C. from
D. to
抽油机巡回检查的主要内容有哪些？
