The cancer risks with smoking have been well proved. A. combined B. associated C. caused D. joined 【查看更多】

 

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The cancer risks _____ with smoking have been well proved.

　 A. combined　 B. associated　 C. caused　 D. joined

 

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The cancer risks _____ with smoking have been well proved.

　 A. combined　 B. associated　 C. caused　 D. joined

 

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