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1.下列各组词语中加点的字,读音全都正确的一组是                     (   )

    A.桎gào       旎yǐ           碑tiè           惊魂定bǔ

    B.生xiāo       漏pī          怪pǐ           力能鼎káng

    C.勇xiāo    亲nì           重chuāng      怙恶不quān

    D.妊chén      首qǐ          告fù           大腹便便biàn

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84. A new kind of mouse was produced ,which is twice large than normal .

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83. By controlling the production of human growth hormone .

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82. To expect food animals that grow faster and larger or produce more milk or eggs.

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81. 4  

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77. Economic impact   78. Boosting/ High death rate 

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74. Nil rainfall   75. Deforestation    76. Overgrazing of livestock 

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71. Desertification  72. affectcing human life  73. Climate changes  

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