早产儿易发生坏死性小肠结肠炎的原因是()
A.各种消化酶不足
B.缺血
C.胆酸分泌较少
D.喂养不当
E.添加辅食
参考答案：A, B, D
一个体重60kg的人,全身总血量约为
A、4000ml
B、4500ml
C、4800ml
D、5500ml
E、6000ml
Eleanor Roosevelt played leading part in women’s organizations, and she was active in encouraging youth movement, and in promoting consumer welfare.
