分析 本文主要介绍高层建筑的一种垃圾分类回收系统.即:垃圾道通向一个带有六个盒子分装不同的回收物的容器,按下按钮进行分装,这种装置能节省回收费用.
解答 21-23 BCA
21.B 主旨大意题.通读全文,主要介绍高层建筑的一种垃圾分类回收系统及它的操作过程.故选B.
22.C 细节理解题.根据第三段The board has a button for each class of recycling materials (as well as for unrecyclables)可知,板子上对每一种回收物质都有对应的按钮,即:将不同的垃圾分类放入与按键相对应的盒子里.故选C.
23.A 推理判断题.根据最后一段Sorting recyclables before they are collected saves the use of expensive materials recovery equipment which otherwise has to do the sorting可知,将回收物收集之前分类节省了使用昂贵的分类设备的费用,即:这种设备减少了回收的费用.故选A.
点评 高考中选用的科技文往往反映的是当今人类最先进的科技水平和最新的科研成果.我们阅读它的过程其实就是学习科学知识,掌握科技信息的过程.然后,理解文章,分析文章,以阅读材料所提供的科学事实为依据,同时得出的结论还应符合基本的科普常识,在细心对照基础上,经过一番分析、综合,然后就要根据题目要求对选项作出正确判断了,这些判断包括选项的表达是否符合原文的意思,对概念,文句的理解是否正确,对要点归纳是否全面等,从而排除错误选项,选择最合适的答案.
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