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【单选题】
能够削弱“在饮食中添加抗氧化剂才能减缓衰老”的论点是什么？（）
A.
吸烟导致体内细胞损伤的主要原因之一
B.
缺乏锻炼的超重者在体内极容易出现自由基过量
C.
抗氧化剂的价格普遍偏高，大部分消费者难以承受
D.
每天参加运动可有效中和甚至清除体内的自由基
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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.
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】我国小麦产量是北方的大于南方的，其主要原因就是______，叶片衰老推迟，灌浆期也延长，使子粒得到更多的同化物，千粒重增大，产量高。
A.
北方昼夜温差小
B.
北方昼夜温差大
C.
北方气温较低
D.
北方晚上温度较低
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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.
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】我国小麦产量是北方的大于南方的，其主要原因就是______，叶片衰老推迟，灌浆期也延长，使子粒得到更多的同化物，千粒重增大，产量高。
A.
北方昼夜温差小
B.
北方昼夜温差大
C.
北方气温较低
D.
北方晚上温度较低
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