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Remote-sensing and field data of Guizhou forest resources in 2000 are processed usingArcGIS, with the production of fore......
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从影响营销活动的各种各样的因素入手，将反映营销工作业绩的各项指标进行整合，建立起一套能够全面、客观反映营销工作实绩的多层次综......
采用组合式温湿敏检测元件,用单片机对8个通道进行数据采集和处理,设置了相应的用户键盘,用户可预置温湿度控制范围,可输出相应的......
In recent years,as we all know that English is spreading and using widely in china.It has developed from monotonous lang......
