Afternumerousexperiments, somedoctorshavemadea

來源:國語幫 1.91W

問題詳情:

Afternumerousexperiments, somedoctorshavemadea

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

A.breakdown  B.break­up 

C.breakthrough  D.breakout

【回答】

C

知識點:名詞

題型:選擇題

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