体内缺乏铁离子可发生()。
A.再生障碍性贫血
B.营养性巨幼红细胞性贫血
C.营养性小细胞性贫血
D.溶血性贫血
E.珠蛋白生成障碍性贫血(地中海贫血)
参考答案:C
给你两个灯泡、一个电源、一个开关和若干导线,要使两个灯泡同时发光,请在图中分别连上你的两种不同接法.
We were in Qingdao last week and ______ great fun there. [ ]
A. will have
B. have had
C. had
D. have