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Scientists have made a major __ in cancer research.A.break-in B.breakthrough C.breakup D.bdakdown选哪个,为什么?

题目详情
Scientists have made a major __ in cancer research.
A.break-in B.breakthrough C.breakup D.bdakdown
选哪个,为什么?
▼优质解答
答案和解析
选B
意为---科学家们在癌症研究方面取得重大突破.
A break-in 非法闯入
B breakthrough 突破
C break up 分手,打碎
D break down 打破,损坏