"人口问题--粮食问题--能源问题"人口,粮食,能源是当今世界急需解决的问题,三者之间存在着相互影响的关系.比如:人口增加,导致人均粮食下降,能源不足等等.广泛收集网友的评论,探讨身边时
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 08:16:37
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