题目内容
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提问人:网友fengchujun
发布时间:2022-01-06
[主观题]
Reorder the following essentials of an abstract. (排序) A. Existing problem B. Conclusion from the research C. Research background D. Methods employed E. Results or findings (请把字母排序,每个字母间用一个空格隔开)
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