Although it has been possible to infer from the goods and services actually produced what manufactures and servicing trades thought their customers wanted,only a study of relevant personal documents written by actual consumers will provide a precise picture of who wanted what. (5)
尽管有可能从实际制造的商品和服务中可推知制造商和服务业认为他们的顾客所需要的是什么，但只有对由实际顾客撰写的相关的个人文件进行一番研究，方能提供一幅精确的图画，藉以说明“什么样的人”需要什么样的东西。
难句类型：复杂修饰、倒装
解释：前面的it是形式主语，主语真正的内容在不定式中。不定式中的大规模倒装，是这个句子读不懂的主要原因：infer的宾语是what从句，而infer和从句之间被以from为首的作状语的介词结构所分隔。正常语序应该是：to infer what manufactures and servicing trades thought their customers wanted from the goods and services actually produced.后面的分句也不好读：主语很长，而且句末的宾语precise picture后面的修饰成分of who wanted what也是比较少见的。
意群训练：Although it has been possible to infer from the goods and services actually produced what manufactures and servicing trades thought their customers wanted,only a study of relevant personal documents written by actual consumers will provide a precise picture of who wanted what.
尽管新gre单词量减少，取消了“类反”但是难度并没有减少，这更要求考生在新gre阅读考试中增强逻辑推理能力。虽然逻辑推理能力的考察对我们国内考生来说有点难度，只要保持好心态就能更好地去理解长难句在gre阅读考试句子类型型。
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