According to the recent research,heavy coffee drinking and heart attack is not necessary __________a

题目简介

According to the recent research,heavy coffee drinking and heart attack is not necessary __________a

题目详情

According to the recent research,heavy coffee drinking and heart attack is not necessary __________
and effect.    
[     ]
A. reason        
B. impact    
C. fact          
D. cause
题型:单选题难度:中档来源:同步题

答案

D

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