我会以 misplaced modifier/改变句意 去解释 (E)把 crests and troughs that ramain stationary 变成 stationary crests and troughs 这意思就不同了 (C)就是对的 因为只是把subject/verb 对照上了 文意没变 OG的解释有时候.....会越看越"花" 个人浅见 有不对的话可以在讨论搂~ ※ 引述《ken22154 (人生=循环)》之铭言： : The peaks of a mountain range, acting like rocks in a streambed, produce : ripples in the air flowing over them; the resulting flow pattern, with (crests : and troughs that remain stationary although the air that forms them is moving : rapidly, are) known as “standing waves.” : (C) crests and troughs that remain stationary although the air that forms : them is moving rapidly, is : (E) stationary crests and troughs although they are formed by rapidly moving : air, is : 答案是C，我选E : 但我看不懂OG的解释，有谁可以指点迷津吗？ : 或是指出我选E的错误～ : Choice E uses the correct verb form, is, but it incorrectly introduces a : dependent adverbial although clause into a prepositional phrase (with : crests...). : In the textbook publishing business, the second quarter is historically : weak, because revenues are (low and marketing expenses are high as companies : prepare) for the coming school year. : 此题原句即是正确答案。而我的疑问是，两个独立子句用连结词连结， : 不是应该中间要加逗点吗？ 所以我觉得and前应该要加逗点 : 还是我的认知有错误？ : 感谢解答～ --

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