After numerous experiments, some doctors have made a ________ in the treatment of cancer. [ ]A. brea

题目简介

After numerous experiments, some doctors have made a ________ in the treatment of cancer. [ ]A. brea

题目详情

After numerous experiments, some doctors have made a ________ in the treatment of cancer.
[     ]
A. breakdown  
B. breakup  
C. breakthrough  
D. breakout
题型:单选题难度:中档来源:四川省同步题

答案

C

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