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题目
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As is known to all , theory is based on practice and _______ serves practice.
A.by chanceB.by turnC.in returnD.in turn

答案
D
解析
短语辨析。by chance偶然;by turn轮流;in return作为回报;in turn轮流,依次,转而,反过来。句意:众所周知,理论以实践为基础,反过来又应用于实践。所以选D。
核心考点
试题【As is known to all , theory is based on practice and _______ serves practice.A.b】;主要考察你对介词和介词短语等知识点的理解。[详细]
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