rc
问compared with nineteenth-century American women, eighteenth-century American women were？
文中介绍了19世纪的情况，那么18世纪的，两相对比情况---取反“they lost it in many aspects of the economic sphere”，说明18世纪是有economic sphere的
rc
information题
原文“More importantly, she shows that the debate itself depends on frame of reference:” 选项“Lebsock has demonstrated the importance of frame of reference in answering questions about women's status.” 不要多想
many became highly effective organizers, gaining the respect of even racist White unionists by winning victories for White as well as African American workers.
a complicated system of whistles, squeaks, moans, trills, and clicks was produced sphincter muscles inside the blowhole.
由于这句话是被动语态，所以其并未指明produce的主语是谁。在本题语境中，创造这些声音的肯定是海豚。如果没有指明是谁，则其无法和they do create sounds这句话形成任何关系。
try to diagram the argument, numbering each of the sentences and using the 'THEREFORE TEST' (try 'x, therefore y' and 'y, therefore x', and see which, if either, of them makes sense).
a, even if需要接完整句子
e, household appliances would have been a miracle to their grandparents.
该句的意思是：机器是给父母们的一个奇迹。显然地，这在逻辑上是不正确的。正确的说法是，父母发现这些机器是奇迹（是机器本身是奇迹，而不是机器是给父母的奇迹）。
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rc
问compared with nineteenth-century American women, eighteenth-century American women were？
文中介绍了19世纪的情况，那么18世纪的，两相对比情况---取反“they lost it in many aspects of the economic sphere”，说明18世纪是有economic sphere的