搜 
Original and good research has a trickle-down () on society.
科目名称：人文英语4
试卷号：10862，11390
题型：词汇与结构(单选题)
题目：Original and good research has a trickle-down () on society.
选项：A. effect B. benefit C. expectation
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答案：A. effect
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