问题
单项选择题
The author was required to submit an_______of about 200 words together with his research paper．
A．edition
B．editorial
C．article
D．abstract
答案
参考答案：B
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The author was required to submit an_______of about 200 words together with his research paper．
A．edition
B．editorial
C．article
D．abstract
参考答案：B