问题
多项选择题
关于获得性再生障碍性贫血的发病机制，叙述正确的有（）
A.造血干细胞缺陷
B.造血微环境异常
C.细胞免疫功能亢进
D.体液免疫功能亢进
E.遗传背景
答案
参考答案：A, B, C, E
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关于获得性再生障碍性贫血的发病机制，叙述正确的有（）
A.造血干细胞缺陷
B.造血微环境异常
C.细胞免疫功能亢进
D.体液免疫功能亢进
E.遗传背景
参考答案：A, B, C, E
根据对话内容，将方框内符合对话语境的句子抄写在对话空白处，使对话恢复完整，选项中有两项是多余的。 A: Where did you go last weekend? B: 小题1:. A: But you told me you wouldn’t go there. You said it was dirty. 小题2:. B: Er, you know, I didn’t want to go there first. But most of my friends went, so I went with them. A: I see. 小题3:. B: I told the old people something interesting around us. A: 小题4: B: I had fun and felt happy. A: 小题5:. Next time, I’ll go with you.
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