分析 本文主要介紹高層建筑的一種垃圾分類回收系統(tǒng).即:垃圾道通向一個帶有六個盒子分裝不同的回收物的容器,按下按鈕進(jìn)行分裝,這種裝置能節(jié)省回收費用.
解答 21-23 BCA
21.B 主旨大意題.通讀全文,主要介紹高層建筑的一種垃圾分類回收系統(tǒng)及它的操作過程.故選B.
22.C 細(xì)節(jié)理解題.根據(jù)第三段The board has a button for each class of recycling materials (as well as for unrecyclables)可知,板子上對每一種回收物質(zhì)都有對應(yīng)的按鈕,即:將不同的垃圾分類放入與按鍵相對應(yīng)的盒子里.故選C.
23.A 推理判斷題.根據(jù)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,將回收物收集之前分類節(jié)省了使用昂貴的分類設(shè)備的費用,即:這種設(shè)備減少了回收的費用.故選A.
點評 高考中選用的科技文往往反映的是當(dāng)今人類最先進(jìn)的科技水平和最新的科研成果.我們閱讀它的過程其實就是學(xué)習(xí)科學(xué)知識,掌握科技信息的過程.然后,理解文章,分析文章,以閱讀材料所提供的科學(xué)事實為依據(jù),同時得出的結(jié)論還應(yīng)符合基本的科普常識,在細(xì)心對照基礎(chǔ)上,經(jīng)過一番分析、綜合,然后就要根據(jù)題目要求對選項作出正確判斷了,這些判斷包括選項的表達(dá)是否符合原文的意思,對概念,文句的理解是否正確,對要點歸納是否全面等,從而排除錯誤選項,選擇最合適的答案.
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