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    Without the “greenhouse effect , the earth would be about thirty-three degrees Celsius cooler than it is. 如果没有这种 “温室效应 .地球的温度将比现在的温度还要低33摄氏度左右. 【查看更多】

     

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    Without the ‘ greenhouse effect’, the earth ____ be about thirty-three degrees Celsius cooler than it is.

    A．should            B．would            C．will              D．must

     

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