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【单选题】
“茶倍健”牙膏中含有茶多酚,茶多酚是目前尚不能人工合成的纯天然、多功能、高效能的抗氧化剂和自由基净化剂。其中没食子儿茶素(GC)的结构简式如图所示 。下列关于GC的叙述中正确的是( )
A.
分子中所有的原子共面
B.
1molGC与4molNaOH恰好完全反应
C.
能发生氧化反应、取代反应、消去反应,难发生加成反应
D.
遇FeCl 3 溶液不发生显色反应
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.
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