The research carried out in eight countries______.A.reveals the relationship between sleep

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The research carried out in eight countries______.

A.reveals the relationship between sleep problems and age

B.provides evidence that lack of sleep affects people"s health

C.puts forward the theory that sleep problems are a kind of disease

D.proves that sleep problems will lead to smoking and poor diet

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热搜:在公制与英制换算中,1in等于()。