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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】下列哪一种氧化还原体系的氧化还原电位最大?
A.
延胡羧酸→丙酮酸
B.
CoQ( 氧化型 ) → CoQ( 还原型 )
C.
Cyta Fe 2+ → Cyta Fe 3+
D.
Cytb Fe 3+ → Cytb Fe 2+
E.
NAD + → NADH