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【单选题】
补充维生素D预防佝偻病一般开始于A.
生后一
B.
生后2左右
C.
生后4
D.
生后6～7
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反馈参考答案：
举一反三
【单选题】What is the conclusion of the research?
A.
What nature is worth and how to value nature.
B.
The brain did not respond to contingent valuation studies the way it did to all other known classes of economic behavior.
C.
striking similarity in the brain structures
D.
All of the answers above mentioned
【简答题】简述乙肝的传播途径及防控原则。
【简答题】下列各种凭证属于外来原始凭证的是（ ）。
【简答题】下列各种凭证属于外来原始凭证的是（ ）。
【简答题】普通交流发电机一般由 、 、 、前后端盖、风扇及带轮等组成。
【单选题】What is the finding of the new study published in the Journal Learning&Memory?
A.
It is not easy to improve one’s sleep habits.
B.
It is not good for students to play video games.
C.
Making last-minute preparations for tests may be less effective than sleeping.
D.
Students who are better prepared generally get higher scores in examinations.
【单选题】What is the finding of the new study published in the journal Learning and Memory ?
A.
It is not easy to improve one’s sleep habits.
B.
It is not good for students to play video games.
C.
Students who are better prepared generally get higher scores in examinations.
D.
Making last-minute preparations for tests may be less effective than sleeping.
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