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参考答案：
【小题23】D
【小题24】C
【小题25】C
习题解析：
【小题23】听力原文中引用Watts的话，提到In terms of drought, we often see corresponding decreases in agricultural productivity, which then in turn has a profound impact on malnutrition, particularly for children.由此可知干旱会导致农业生产力降低，而农业生产力下降反过来又会对营养不良问题产生重大影响，尤其是儿童营养不良。由此可知，干旱会导致粮食产量减少和让更多的人营养不良，D项表述符合原文，故选D。
【小题24】听力原文中提到Outdoor air pollution is linked to some three million deaths worldwide. Watts says a shift from coal-fired power plants to renewable energy can greatly reduce that danger. 由此可知，全球有300万人的死亡与户外空气污染有关，Watts认为从燃煤发电转向可再生能源可以有效降低这一危险，因而选项C为正确答案，故选C。
【小题25】听力原文中明确提到Watts says public health is at the core of a new global agreement.即Watts认为公众健康是新的全球协议的核心，因而C项表述符合原文，故选C。
