“Boys and girls, you are asked to submit a(n) _______ of about 100 words of the lecture given by Professor Yu tomorrow” , said the teacherA.impressionB.reportC.abstractD.conclusion
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B解析考查名词：A. impression印象，B. report报告，C. abstract抽象画，D. conclusion结论，句意是：孩子们，你们要上交一份100字的关于昨天余教授做的讲座的报告。选B。