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The document explaining detailed paper submission requirements is a （）.
The document explaining detailed paper submission requirements is a （）.
A.call for papers
B.conference notice
C.conference program
D.letter of invitation
正确答案：call for papers
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学术交流英语
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According to the following conference program, the time slot allocated to parallel sessions on Day 1 is （）.
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Invitation letters are usually sent by （） to scholars and experts in the field and other prospective participants.