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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】枸杞中的（）含有大量的不饱和脂肪酸，氧化物歧化酶、维生素E等，可降低胆固醇，抑制血栓，滋补肝肾，益精明目，养颜美容。
A.
枸杞多糖
B.
类胡萝卜素
C.
黄酮类化合物
D.
枸杞籽油