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    根据下面句子中的汉语提示写出单词的正确形式。

    1.Research findings have shown that about 20 percent of people only 10 percent can be __________(分类) as “early birds”.

    2.The company never __________(妥协) on the quality of its products.

    3.It was this exploring around problems and his __________(充满活力的) spirit that led to his most famous invention—the telephone in 1876.

    4.The __________(标准) are so strict that it is difficult to get new ideas accepted unless they are truly novel.

    5.The __________(最初的) requirement is that you need perfect DNA which gives information for how cells are to grow.

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