高龄初产,婚后多年不育者,易发生高危妊娠
参考答案:对
心功能不全时,下列不是其代偿方式的是()。
A.交感神经兴奋
B.心肌增肥
C.心室扩大
D.血管紧张素分泌增加
E.迷走神经兴奋
Questions 19~22
A. She reads a lot.B. She is a student. C. She has to work this weekend. D. She does not like the man.