8.The idea of getting freshwater from icebergs (冰山) that are pulled to populated areas and dry areas of the world was once treated as a joke more fit for cartoons than real life.But now it is being considered quite seriously by many nations,especially since scientists have warned that the human race will outgrow its freshwater supply faster than it runs out of food.
Glaciers (冰川) are a possible source of freshwater that has been overlooked until recently.
Three-quarters of the Earth's freshwater supply is still tied up in glacial ice,a reservoir of untapped freshwater so huge that it could carry on all the rivers of the world for 1,000years.
Huge glaciers that widen over the shallow continental shelf give birth to icebergs throughout the year.Because they melt more slowly than smaller pieces of ice,icebergs have been known to drift as far north as 35degrees south of the equator (赤道) in the Atlantic Ocean,To hold them and guide them to parts of the world where they are needed would not be too difficult.
The difficulty appears in other technical matters,such as the prevention of rapid melting in warmer climates and the guiding of freshwater to shore in great volume (量).But even if the icebergs lost half of their volume in drawing,the water they could provide would be far cheaper than that produced by removing salt from seawater.
24.Why do more countries consider getting freshwater from icebergs now?D
A.There are too many icebergs.
B.The huge glaciers may bring too many floods.
C.The population across the world changes too often.
D.Scientists have warned people of the serious situation.
25.The underlined word"overlooked"in Paragraph 2probably means"D".
A.had a careful look
B.a(chǎn)llowed to pass
C.taken seriously
D.failed to notice
26.What makes getting freshwater from icebergs difficult?B
A.The high cost and fewer glaciers.
B.Warmer climate and practical actions.
C.The slow moving speed of the icebergs.
D.The time of waiting for the icebergs'melting.
27.Which of the following might be the best title for the passage?A
A.Get Freshwater From Icebergs
B.Icebergs Cause Global Warming
C.Look for a Better Way to Get Water
D.Solve the Problem of Water Shortage.
分析 把冰山搬到世界上人口稠密的地區(qū)和干旱地帶.再從中獲取淡水,這個想法曾被認(rèn)為是一個笑話.但是,現(xiàn)在已經(jīng)有很多國家在考慮這件事情了.
解答 DDBA
24.D 細(xì)節(jié)理解題.根據(jù)第一段最后一句But now it is being considered quite seriously by many nations,especially since scientists have warned that the human race will outgrow its freshwater supply faster than it runs out of food可知.科學(xué)家們的警告和目前已經(jīng)存在的世界缺水的情況使越來越多的國家開始考慮這種方法.故答案為D.
25.D 詞義猜測題.畫線詞所在句中的until recently說明以前這個問題沒有得到足夠的重視,即被忽視了.overlook意為"忽視".故答案為D.
26.B 細(xì)節(jié)理解題.根據(jù)最后一段第一句The difficulty appears in other technical matters,such as the prevention of rapid melting in warmer climates and the guiding of freshwater to shore in great volume 可知,從冰山獲取淡水的困難在于技術(shù)方面.如無法阻止冰川在較溫暖的氣候中快速融化及如何引導(dǎo)這些淡水等.故答案為B.
27.A 標(biāo)題概括題.文章第一段提出了從冰山獲取淡水這一想法,下文提到了理論依據(jù)和方法,最后一段中提到了困難所在,這些都是圍繞著從冰山獲取淡水展開的,故A項為最佳標(biāo)題.
點評 本文是人文地理類閱讀理解.做這類題材閱讀理解時要求考生對文章通讀一遍,做題時結(jié)合原文和題目有針對性的找出相關(guān)語句進(jìn)行仔細(xì)分析,結(jié)合選項選出正確答案.推理判斷題也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確答案,切忌胡亂猜測,一定要做到有理有據(jù)