4.For many people who live in cities,parks are an important landscape.They provide a place for people to relax and play sports,as well as a shelter from the often severe environment of a city.What people often overlook is that parks also provide considerable environmental benefits.
One benefit of parks is that plants absorb carbon dioxide and give off oxygen.According to one study,an acre of trees can absorb the same amount of carbon dioxide that a typical car emits in 11,000 miles of driving.Parks also make cities cooler.Scientists have long noted what is called the Urban Heat Island Effect:building materials such as metal and concrete(混凝土)absorb much more of the sun's heat and release it much more quickly than trees and grass.Because city landscapes contain so much of these building materials,cities are usually warmer than surrounding rural areas.Parks and other green spaces help to lessen the Urban Heat Island Effect.
Unfortunately,many cities cannot easily create more parks.However,cities could benefit from many of the positive effects of parks by encouraging citizens to create another type of green space:rooftop gardens.While most people would not think of starting a garden on their roof,human beings have been planting gardens on rooftops for thousands of years.Some rooftop gardens are simple container gardens that anyone can create with the investment (投資) of a few hundred dollars and a few hours of work.
Rooftop gardens provide many of the same benefits as other urban parks and garden spaces,but without taking up the much-needed land.In the summer,rooftop gardens prevent buildings from absorbing heat from the sun,which can significantly reduce cooling bills.In the winter,gardens help control the heat that materials like brick and concrete release so quickly,leading to savings on heating bills.Rooftop vegetables and herb gardens can also provide fresh food for city settlers,making their diets healthier.Rooftop gardens are not only something everyone can enjoy but also a smart environmental investment.

32. The underlined word"emits"in the second paragraph probably meansA.
A.gives out
B.takes up
C.carries away
D.breathes in
33. Which of the following contributes to the Urban Heat Island Effect?A
A.More building materials.
B.More trees and grass.
C.More parking lots.
D.More rooftop gardens.
34. When it comes to rooftop gardens,what can be inferred from the passage?C
A.They make people much happier.
B.They provide more benefits from urban parks.
C.They help to save money and keep a healthy diet.
D.They have become very popular in recent years.
35. What's the author's attitude towards rooftop gardens?B
A.Doubtful.
B.Supportive.
C.Critic al.
D.Objective.

分析 本文是一篇科教類閱讀,屬于說明文,主要講述了對于許多住在城市的人來說,公園是一個重要場地,它們?yōu)槿藗兲峁┮粋放松和運動的地方,以及躲避嚴(yán)重環(huán)境污染的地方.人們常常忽略的是,公園還提供可觀的環(huán)境效益.

解答 32.A 33.A 34.C 35.B
32.A.詞義猜測題.根據(jù)"an acre of trees can absorb the same amount of carbon dioxide that a typical car emits in 11,000 miles of driving"可知,emits與本句中的absorb相對應(yīng),意為"發(fā)出".故選A.
33.A.細(xì)節(jié)理解題.由第二段第5句"Because city landscapes contain so much of these building materials,cities are usually warmer than surrounding rural areas."可知,建筑材料造成了城市熱島效應(yīng).故選A.
34.C.推理判斷題.由第四段最后三句"In the winter,gardens help control the heat that materials like brick and concrete release so quickly,leading to savings on heating bills."可知,.在冬天,花園幫助控制磚和混凝土等材料的熱釋放如此之快,導(dǎo)致節(jié)省取暖費用.故選C.
35.B.觀點態(tài)度題.由最后一段,尤其是"Rooftop gardens are not only something everyone can enjoy but also a smart environmental investment."可知,作者對于屋頂花園的態(tài)度是積極支持的.故選B.

點評 閱讀理解題測試考生在閱讀基礎(chǔ)上的邏輯推理能力,要求考生根據(jù)文章所述事件的邏輯關(guān)系,對未說明的趨勢或結(jié)局作出合理的推斷;或根據(jù)作者所闡述的觀點理論,對文章未涉及的現(xiàn)象、事例給以解釋.考生首先要仔細(xì)閱讀短文,完整了解信息,準(zhǔn)確把握作者觀點.

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