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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there must be some technologies which are in use today will disappear or be out of date in 50 years。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
    Some of the modern technologies will be supposed to be out of date or to disappear in 50 years.
    PS: Actually the problem is not about the clause you are looking at but other parts of this sentence.


    2楼2012-04-20 16:38
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      be in use是正在使用的意思?上述使用正确!


      来自手机贴吧3楼2012-04-20 16:44
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        谢谢亲


        4楼2012-04-20 16:44
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