成人引起缺铁性贫血的最常见原因是
A.摄入减少B.慢性失血C.胃酸缺乏D.需要量增加E.胃大部切除术
参考答案:B
解析:慢性失血造成铁的丢失增加.成人引起缺铁性贫血。
— Have you ever been to Shanghai?
— Yes. I there with my father last year.
A.went
B.have been
C.have gone
D.has been
生殖生长