What do researchers currently believe inpreventing cancers

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The author's tone in the article can be described as

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After his phone suddenly began ringing, the author

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我国宪法规定了公民的基本权利和义务,公民在法律面前一律平等。下列关于我国公民基本权利的表述,不正确的是(  )。

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关于两汉天文学成就的叙述,不正确的是(  )。

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