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  • Controlling Cancer 控制癌症 日期:2007-11-17 12:39:42 来源:作文地带 好评:优秀英语作文

    Controlling Cancer 控制癌症 There are two main causes of cancer: heredity and environment. We can do nothing to change our heredity, that is, the basic physical characteristics that were passed on to us by our parents. However, we can do a great dea...

    Cancer Controlling 控制癌症

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