问题 问答题 简答题

怎样降低和消除城市热岛效应?

答案

参考答案:

降低和消除城市热岛效应要标本兼治。主要措施为:①在控制城市发展的同时,要控制城市人口密度、建筑物密度。②保护并增大城区绿地、水体面积,建设林荫大遒,并选择高效美观的绿化形式,包括街心公园、屋顶绿化和墙壁垂直绿化及水景设置,降低热岛效应城市绿化覆盖率与热岛强度成反比,绿化覆盖率越高,则热岛强度越低。覆盖率大于30%后,热岛效应得到明显削弱;大于50%,热岛效应明显削减;规模大于三公顷且绿化覆盖率达到60%以上的集中地带,基本上与郊区温度相当,即消除了城市热岛效应。③把消除裸地、消灭扬尘作为城市管理的重要内容,除建筑物、硬路面和林木之外,全部地表应为草坪所覆盖。④提高能源的利用率,减少人工热量排放。⑤改善市区道路的保水性性能,用透水性强的新型材料铺设公路,以储存雨水,降低路面温度。⑥提高人工水蒸发补给,例如喷泉、喷雾、

细水雾浇灌。

完形填空
Norman Cousins was a businessman from the United States who often traveled around the world on business. He enjoyed his       and traveling.
Then, after returning to the United States from a       trip to the Union of Soviet Socialist Republic (USSR), Mr. Cousins got sick. Because he had pushed his body to the       of its strength on the trip, a change began to take place        him. The material between his bones became      .
In less than one week after his return, he could not      . Every move that he       was painful. He was not able to sleep at night. The doctors told him that they did not know how to cure Mr. Cousins’ problem and he might never       over the illness. Mr. Cousins, however, refused to give up      . Mr. Cousins thought that       thoughts were causing bad chemical changes in his body. He did not want to take medicine to cure himself.      , he felt that happy thoughts or       might cure his illness.
He began to       on himself while still in the hospital by watching funny shows on television. Mr. Cousins quickly found that 10 minutes of real laughter during the       gave him two hours of pain-free sleep at night.       the doctors could not help him, Mr. Cousins left the hospital and checked into (登记住宿) a hotel room where he could       his experiments with laughter. For eight days, Mr. Cousins rested in the hotel room watching funny shows on television, reading funny books, and sleeping __   he felt tired. Within three weeks, he felt well       to take a vacation to Puerto Rico where he began running on the beach for      . After a few months, Mr. Cousins returned to work. He had laughed himself back to      .
小题1:
A.timeB.holidayC.sleep D.work
小题2:
A.boringB.tiring C.dangerous D.pleasant
小题3:
A.top B.degree C.problemD.limit
小题4:
A.fromB.around C.insideD.beside
小题5:
A.weakB.illC.false D.strong
小题6:
A.speakB.breatheC.stand D.see
小题7:
A.madeB.didC.putD.ran
小题8:
A.lookB.getC.turnD.think
小题9:
A.effortB.hopeC.treatment D.arrangement
小题10:
A.foolishB.unusualC.funny D.unhappy
小题11:
A.InsteadB.HoweverC.Therefore D.Otherwise
小题12:
A.sleepB.travel C.laughterD.television
小题13:
A.beatB.operateC.tryD.experiment
小题14:
A.dayB.weekC.month D.year
小题15:
A.PromisingB.TellingC.Imagining D.Guessing
小题16:
A.invent B.beginC.continue D.prove
小题17:
A.untilB.wheneverC.unlessD.so that
小题18:
A.soonB.veryC.slowlyD.enough
小题19:
A.exerciseB.illnessC.restD.pleasure
小题20:
A.powerB.senseC.healthD.happiness
单项选择题