Which of the following is the characteristic of free radicals?

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问题 Which of the following is the characteristic of free radicals?

选项 A、They are a partial cause of certain diseases.
B、They escape into the atmosphere when we breathe.
C、They are present in two vitamins.
D、They are produced by our bodies.

答案A

解析第二段第二句提到自由基和多种疾病有关(be implicated in diseases)，其中的implicate一词指“涉及，牵涉”，故A正确。

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Which of the following is the characteristic of free radicals?

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Sendingarobotintospacetogatherinformationiscertainlyaviableoption,Linebutshouldberegardedonlyasthat--anopt

Allmammalsrequiresleep;itisanessentialpartoflife.Forgiraffes,twohoursaLinedayisenough.Forbats,thatnumber

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