Walnut trees __________ environment stresses such as drought by producing sig...

作者: tihaiku 人气: - 评论: 0
问题 Walnut trees __________ environment stresses such as drought by producing significant amountsof a substance similar to aspirin.
选项 A.turn to B.confirm to C.contribute to D.respond to
答案 D
解析 考查动词短语辨析。turn to“转向;变成;求助于;致力于;开始行动”,confirm to“证实”,contribute to“有助于”,respond to“对……反应”。句意为“面对来自环境的压力,例如干旱,胡桃树会释放大量类似阿司匹林的物质”。D项最符合句意。

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