分析 本文敘述了一項新的研究發(fā)現(xiàn)植株之間交流是危險的警告.植株之間的交流就是一種化學(xué)物質(zhì).科學(xué)家觀察了害蟲在植株上滋生的過程,發(fā)現(xiàn)在被害蟲感染的植株上有一種化學(xué)物質(zhì).這種物質(zhì)放在健康的植株上,也會產(chǎn)生這些物質(zhì).因此要確保植株健康,首先要有友好的鄰居.總之,植株之間不僅交流,而且要互相小心.
解答 32.答案:B 詞義猜測題.根據(jù) 單詞所在的句子They have found out one chemical message and traced it all the way from beginning to end.."他們發(fā)現(xiàn)了一種化學(xué)信息并從頭到尾進行了跟蹤."可知此處表示"從頭到尾一直在跟蹤",相當(dāng)于動詞follow,故選B.
33.答案:C 細節(jié)理解題.根據(jù)To start out,they grew plants in two separate plastic spaces connected by a tube(管子).One plant was infested and placed upwind and the other was uninfested and placed downwind.The downwind plants were later exposed(暴露) to the pest.可知科學(xué)家觀察害蟲在植株上滋生的步驟為:首先他們在兩個由管子連接獨立的塑料空間種上植株,一棵植株被感染上害蟲,放在迎風(fēng)的地方,另一棵植株沒有被感染,被放在順風(fēng)的地方.不久順風(fēng)地方的植株也暴露在害蟲面前.故選C.
34.答案:D 推理判斷題.根據(jù)They found one chemical appeared more often in the exposed plants.可知他們在被暴露的植株上發(fā)現(xiàn)了一種化學(xué)物質(zhì),故在此之前應(yīng)是科學(xué)家把被暴露的植株和沒被暴露的植株進行比較,才會發(fā)現(xiàn)他們之間的差別.因此這句話應(yīng)出現(xiàn)在第6段.故選D.
35.答案:B 標(biāo)題歸納題.根據(jù)A new study finds that plants communicate with one another to warn of danger.可知本文是圍繞著對植物之間互相交流帶來的危險的友好警告.故選B.
點評 做閱讀理解時,要注意培養(yǎng)自己快速閱讀的習(xí)慣.切不可在個別難懂的詞句上磨蹭,只要全篇理解了,個別難懂的詞句可以根據(jù)上下文和構(gòu)詞法去猜測,去推斷.
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