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【单选题】
天然抗氧化剂生育酚广泛存在于高等动植物组织中,它具有防止动植物组织内脂溶性成分氧化变质的功能,具有 种异构体。
A.
3
B.
5
C.
7
D.
9
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】If those "mad moments"— when you can’t recall what your friend has told you or where you left your keys—are becoming more frequent, mental exercises and a healthy brain diet may help. Just as bodies r...
A.
everyone can be forgetful sometimes regardless of one’s age
B.
we can prevent our sound mind from aging with certain methods
C.
brain aging starts from the time when we are in our 20s and 30s
D.
memory loss is a sign that shows we are getting old
【单选题】用硫酸铈法检查维生素E中的游离生育酚，《中国药典》规定维生素E中所含游离生育酚不得超过( )
A.
5%
B.
0.9%
C.
2.15%
D.
10.05%
E.
1.05%