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问一道GRE填空Longdale and Stern discovered that mitochondria and

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问一道GRE填空
Longdale and Stern discovered that mitochondria and chloroplasts ___ a long,identifiable sequence of DNA; such a coincidence could be ___ only by the transfer of DNA between the two systems.
A:manufacture D accomplished
B reveal E explained
C share F repeated
有解释说coincidence理解为 一致性,还有第二空 感觉D也是可以的~
好久没做GRE了,还是3年前考的了.选B E吧?我个人觉得coincidence不需要什么特殊理解,这种巧合只能通过XX来解释 不难理解吧?accomplish a coincidence不太合理