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which are in use today 这句话对吗

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there must be some technologies which are in use today will disappear or be out of date in 50 years。
请教:which are in use today 这句对么?还是which are used today
谢谢大家!!!


1楼2012-04-20 16:33回复
    谢谢亲


    4楼2012-04-20 16:44
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