According to the recent research, heavy coffee drinking and heart attack is not necessary and effect. A. reason B. impact C. fact D. cause 【查看更多】

 

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According to the recent research,heavy coffee drinking and heart attack is not necessary __________
and effect.    
[     ]
A. reason        
B. impact    
C. fact          
D. cause

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According to the recent research, heavy coffee drinking and heart attack is not necessary ________ and effect.

[  ]

A.reason
B.impact
C.fact
D.cause

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