分析 本文屬于說明文閱讀,作者通過這篇文章主要向我們描述了一氧化碳的特性,一氧化碳中毒的原理及中毒后人體的反應等,提醒讀者一定要謹防一氧化碳中毒.
解答 31.B.細節(jié)理解題.題干關鍵詞為"the silent killer".由文章第二段中的"The gas has no color.It has no taste.It has no smell.It does not cause burning eyes.And it does not cause people to cough."可以看出,一氧化碳無色、無味、不刺激眼睛、也不會讓人咳嗽,也就是說它不容易被人發(fā)覺.故選B.
32.D.細節(jié)理解題.由第三段第一句"Carbon monoxide decreases the ability of the blood to carry oxygen to body tissues."可以看出,一氧化碳傷害人體的方式是:降低血液攜帶氧氣的能力;故選D.
33.A.細節(jié)理解題.倒數(shù)第二段向我們描述了人體吸入一氧化碳后的反應:吸入少量時,會頭疼,感覺勞累,惡心,房子似乎開始轉動,不能清晰地思考.A項所說的"feel a little dizzy"對應"The room may appear to be turning around.";故選A.
34.C.細節(jié)理解題.最后一段講述了不同的人吸入一氧化碳后的不同反應,老人及身體健康狀況欠佳的人所受的影響會更大.注意,D項干擾性最大,但是"suffer from chest pains"只是患有心臟方面疾病的人一氧化碳中毒后的癥狀之一,而不是唯一的癥狀,其癥狀還包括"terrible stomach pains";故選C.
35.D.寫作目的題.從全文內容可知,文章向我們介紹了一氧化碳的特性,一氧化碳中毒的原理及中毒后人體的反應等,故D項是文章的寫作目的;故選D.
點評 考察學生的細節(jié)理解和推理判斷能力,做細節(jié)理解題時一定要找到文章中的原句,和題干進行比較,再做出正確的選擇.在做推理判斷題不要以個人的主觀想象代替文章的事實,要根據(jù)文章事實進行合乎邏輯的推理判斷.
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