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【多选题】
茶是我国的传统饮品，茶叶中含有的茶多酚可以替代食品添加剂中对人体有害的合成抗氧化剂，用于多种食品保鲜等，如图所示是茶多酚中含量最高的一种儿茶素A的结构简式，关于这种儿茶素A的有关叙述不正确的是
A.
分子式为C 15 H 12 O 7
B.
1 mol儿茶素A在一定条件下最多能与7 mol H 2 加成
C.
等质量的儿茶素A分别与足量的金属钠和氢氧化钠反应，消耗金属钠和氢氧化钠的物质的量之比为1：1
D.
1 mol儿茶素A与足量的浓溴水反应，最多消耗Br 2 4 mol
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【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.
have some mental problems
B.
have lost our important things
C.
don’t listen to what our friends tell us to do
D.
fail to remember what should be remembered
【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
【多选题】下列对于抗氧化剂的描述正确的有（）
A.
抗氧化剂具有延长贮藏期，阻止或推迟食品氧化
B.
抗氧化剂按组成可分为天然的和人工合成的
C.
根据作用机理可分为主抗氧化剂和次抗氧化剂
D.
BHT、柠檬酸和赖氨酸都可作为抗氧化剂
相关题目：
【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.
have some mental problems
B.
have lost our important things
C.
don’t listen to what our friends tell us to do
D.
fail to remember what should be remembered
【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
【多选题】下列对于抗氧化剂的描述正确的有（）
A.
抗氧化剂具有延长贮藏期，阻止或推迟食品氧化
B.
抗氧化剂按组成可分为天然的和人工合成的
C.
根据作用机理可分为主抗氧化剂和次抗氧化剂
D.
BHT、柠檬酸和赖氨酸都可作为抗氧化剂
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