皮皮学，免费搜题
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【单选题】
小儿经常晒太阳可以预防哪一种维生素缺乏 ( )A.
维生素K
B.
维生素A
C.
维生素C
D.
维生素D
E.
维生素B
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】【单选】国际及我国都规定:船舶油舱柜的油气浓度在爆炸下限的 或以下时,才能进行热工作业,在爆炸下限 的或以下时,才能进入某些区域。
A.
1%/ 3%
B.
3%/ 5%
C.
1%/5%
【单选题】--- Will you please spare me a few minutes now? --- ___, but I’ll be free in half an hour.
A.
No, I can’t
B.
Yes, with pleasure
C.
No problem
D.
I’m afraid not
【单选题】听力原文：M: There are just one or two more things, Catherine. W: Do call me Cathy. M: OK, Cathy. Are you really interested in being a vet? W: Not really. Anyway, I'm not bright enough. I'm reasonably inte...
A.
ballet.
B.
Swimming.
C.
Nursing.
D.
Teaching
【单选题】听力原文：M: There are just one or two more things, Catherine. W: Do call me Cathy. M: OK, Cathy. Are you really interested in being a vet? W: Not really. Anyway, I'm not bright enough. I'm reasonably inte...
A.
ballet.
B.
Swimming.
C.
Nursing.
D.
Teaching
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