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  1. perfect ; Thanks alot
    I am interested in understanding drug resistance in cancer , can you refer me to a good book explaining this issue

  2. 颜老师一直是我的偶像,现在发现颜老师英语口语也一般,终于发现自己可以跟她差不多甚至还好的地方了,在追赶的路上看到了一丢丢希望

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