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Heat is the largest energy end-use in the world, accounting for about 50％of global final energy consumption. In 2019, the......
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Supply and demand factors influencing adherence to tobacco use treatment guidelines among health car
Background: The Preventive Health Service Guideline on Treating Tobacco Use and Dependence is found to be evidence-based......
目前我国加强对稀土生产和出口的限制，而同时国内稀土消费保持较快的增长趋势， 把握好稀土行业的发展趋势，对规范稀土行业秩序和实现......
一、国内粮食供应进入紧平衡rn据农业部统计并公布,2010年我国粮食总产量达到10928亿斤,比2009年增加312亿斤,增长2.9%,实现半个世......
对2001年铅、锌市场供求关系和价格走势进行了分析，并对2002年铅、锌市场供求关系和价格走势进行预测。本文认为：至少2002年下半年之......
