建筑废弃物资源化多级利用模式研究-建筑经济 关键词] 建筑废弃物；资源化再生；多级利用 [gap=365]Key words: construction garbage; resource regenerative utilization; multistage utilization
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它以生态系统中能量多级利用和物质循环再生为基本原理，按照这一原理，就可以合理设计食物链。
It takes advantages of the basic ecosystem principle of multi-level energy exploitation and substance recycling to reasonably design food chains.
利用多级离子注入技术，一种新型的CMOS四值译码器与编码器被设计。
By using the multiple ion implantation technique, novel CMOS quaternary decoder and encoder are designed.
基于实践，介绍了网页式课件中，利用层来实现多级结构图的演示及注释说明式图片的一种方法。
Based on practice, introduces a way how to implement a dynamic showing of multilevel structure map and remark map by layer in homepage courseware.
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