新GRE考试：阅读难句解读22

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It was not the change in office technology，but rather the separation of secretarial work，previously seen as an apprenticeship for beginning managers，from administrative　work that in the 1880’s created a new class of "dead-end" jobs，thenceforth considered "women’s work."   
$ t2 c9 R/ k. V0 a' _9 `5 b4 H　　十九世纪八十年代，产生了新的一类“没前途”的职业，这并不是因为办公室技术发生了改变，而是由于秘书工作——在此之前被视作是初起步的经理们的一种习见训练——与行政工作的分离。自此以后，这类“没前途”的职业便被视作是“女人的工作。”
. E3 e; t9 o" l　　难句类型：复杂修饰、插入语 来自www.Examw.com
　　解释：这句话的结构是It was something that,,,It是形式主语，其真正的内容是was之后、that、之前的something的内容。本句的something结构复杂、长度惊人，并且包含了一个较长的插入语，把固定搭配separation from分开，造成了极大的阅读困难，其实这个句子说得简单就是It was the separation of secretarial work from administrative work that created a new class of jobs.
　　意群训练：It was not the change in office technology，but rather the separation of secretarial work，previously seen as an apprenticeship for beginning managers，from administrative work that in the 1880’s created a new class of "dead-end" jobs，thenceforth considered "women’s work."
# o" ~- k2 j1 K, |　　注：本文难度再分不清separation … from 的搭配关系