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Which of the following descriptions about the amount of Vitamin D intake is true?
A.The upper limit of Vitamin D intake for adults is 400 lUs.
B.It is dangerous for adults to take 2,000 lUs Vitamin D daily.
C.An overdose of Vitamin D does not necessarily result in diseases.
D.For people under 50, it is safe to take 200 lUs Vitamin D daily.

A.The
B.
B.It
C.
C.An
D.
D.For
E.


【参考答案】

D
事实细节题。由题干关键词VitaminDintake定位到第三段第二句…recommendations...are200IUsadayfrombirthtoage50andabitmoreafterthat...可知,对于50岁以下及略高于50岁的人群设定的建议安全标准是每天200国际单......

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