由于维生素B12、叶酸缺乏引起的贫血是（）。 A.小细胞低色素性_爱下问搜题

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问题单项选择题 A1/A2型题

由于维生素B₁₂、叶酸缺乏引起的贫血是（）。

A.小细胞低色素性贫血

B.大细胞性贫血

C.正常细胞性贫血

D.小细胞高色素性贫血

E.再生障碍性贫血

答案

参考答案：B

解析：

叶酸和维生素B₁₂缺乏引起巨幼细胞贫血。

填空题

短语填空。
用下面方框中的短语的正确形式填空，使句子意思完整。

defend against,concentrate on,accuse of,so as ( not) to,depend on,
be eager to do sth/for sth,approve of,be supposed to,look forward to

1. The young _____ knowledge.
2. She _______ her husband ________ having broken his words.
3. I ________ your eaming some money,but don't give up studying.
4. Stop talking and ______ your work.
5. I _________ get that job.
6. Coin quietly ______ wake up the baby.
7. They are _______ seeing you again soon.
8. Here we are well______ a surprise attack.
9. They weren't __________ enter the building by the back door;however,the front door was locked.
10. Children_____________ their parents for food and clothing.

判断题

在经济周期的繁荣阶段，失业率会上升。