题目内容
4.California Condor's Shocking RecoveryCalifornia condors are North America's largest birds,with wind-length of up to 3 meters.In the 1980s,electrical lines and lead poisoning(铅中毒) nearly drove them to dying out.Now,electric shock training and medical treatment are helping to rescue these big birds.
In the late 1980s,the last few condors were taken from the wild,and there are now more than 150flying over California and nearby Arizona,Utah and Baja in Mexico.
Electrical lines have been killing them off."As they go in to rest for the night,they just don't see the power lines,"says Bruce Rideout of San Diego Zoo.Their wings can bridge the gap between lines,resulting in electrocution(电死) if they touch two lines at once.
So scientists have come up with a shocking idea.Tall poles,placed in large training areas,teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock.Before the training was introduced,66% of set-freed condors died of electrocution.This has now dropped to 18%.
Lead poisonous has proved more difficult to deal with.When condors eat dead bodies of other animals containing lead,they absorb large quantities of lead.This affects their nervous systems and ability to produce baby birds,and can lead to kidney(肾) failures and death.So condors with high levels of lead are sent to Los Angeles Zoo,where they are treated with calcium EDTA,a chemical that removes lead from the blood over several days.This work is starting to pay off.The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011.
Rideout's team thinks that the California condors'average survival time in the wild is now just under eight years."Although these measures are not effective forever,they are vital for now,"he says."They are truly good birds that are worth every effort we put into recovering them."
63.California condors attract researchers'interest because theyD.
A.are active at night
B.had to be bred in the wild
C.are found on in California
D.almost died out in the 1980s
64.Researchers have found electrical lines areB.
A.blocking condors'journey home
B.big killers of Califorbnia condors
C.rest places for condors at night
D.used to keep condors away
65.According to Paraghaph 5,lead poisoningD.
A.makes condors too nervous to fly
B.has little effect on condors'kidneys
C.can hardly be gotten rid of form condors'blood
D.makes it different for condors to produce baby birds
66.The passage shows thatC.
A.the average survival time of condors is satisfactory
B.Rideout's research interest lies in electric engineering
C.the efforts to protect condors bave brought good results
D.researchers have found the final answers to the problem.
分析 本文主要介绍了科学家拯救美国加利福尼亚鹰的两种方法:一种是通过对电的感应的训练;另一种是将严重铅中毒的鹰送往洛杉矶动物园用依地酸二钠钙(一种能溶解铅的化学物质)进行治疗.此外,本文还提到环境对加利福尼亚鹰的危害以及加利福尼亚鹰正急剧减少并濒临灭绝的状况.
解答 63.D 推理判断题.由文章第一段内容可知,In the 1980s,electrical lines and lead poisoning(铅中毒) nearly drove them to dying out.加利福尼亚鹰是北美最大的鸟,但在20世纪80年代几乎濒临灭绝.可见拯救加利福尼亚鹰的形势之危急,因此可以推知"引起科学家关注的原因是____"D.答案为D.
64.B 细节理解题.由第一段In the 1980s,electrical lines and lead poisoning(铅中毒) nearly drove them to dying out.可知,导致加利福尼亚鹰濒临灭绝的原因有两个,其中之一是electrical lines(电线),由此可推出答案B.
65.D 细节理解题.细节可以在文中第四段查找."they absorb large quantities of lead.This affects their nervous systems and ability to produce baby birds,and can lead to kidney(肾) failures and death."可知影响生育.因此选D
66.C 推理判断题.A错误,加利福尼亚鹰存活数量少,B错误,科学家团队的研究爱好不是在电力工程上,D错误,研究者并未找到最后的解决办法,由句子Although these measures are not effective forever…可知,现在的办法并不是永久的办法.因此选C.由第四段The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011.和最后一段the California condors'average survival time in the wild is now just under eight years可知,取得了良好的效果.
点评 作答本题,考生需在文中着重抓住细节信息.在综合细节的基础上进行判断,在文中找到信息.
A. | can't get | B. | mustn't get | ||
C. | can't have got | D. | shouldn't have got |
A. | since | B. | after | C. | before | D. | until |
sight-seeing package that
combines the best of Sydney's
harbour,city,bay and beach
highlights.
A SydneyPass gives you unlimited and flexible travel on the Explorer Buses:the'red'Sydney Explorer shows you around our exciting city sights wlrile the'blue'Bondi Explorer visits Sydney Harbour bays and famous beaches.Take to the water on one of three magnificent daily harbour cru/ses(游船).You can also travel free on regular Sydney Buses,Sydney Ferries or CityRail services (limited area),so you can go to every corner of this beautiful city.
Imagine browsing at Darling Harbour,sampling the famous seafood at Watsons Bay or enjoying the city lights on an evening ferry cruise.The possibilities and plans are endless with a SydneyPass.Wherever you decide to go,remember that bookings are not required on any of our services so tickets are treated on a first in,first seated basis.
SydneyPasses are avai-lable for 3,5 0r 7days for use over a 7calendar day period.With a 3or 5day pass you choose on which days out of the 7you want to use it.All SydneyPasses include a free Airport Express inward trip before starting your 3,5 0r 7days,and Lhe return trip is valid (育效的) for 2months from the first day your ticket was used.
SydneyPass Fares
Adult | Child | Family | |
3 day ticket | 90 dollars | 45dollars | 225dollars |
5day ticket | 120dollars | 60dollars | 300dollars |
7 day ticket | 140dollars | 70dollars | 350dollars |
**A family is defined as 2adults and any number of children from 4to under 16years of age from the same family.
69.A SydneyPass doesn7t offer unlimited rides onD
A.the Explorer Buses
B.the harbour cruises
C.regular Sydney Buses
D.CityRail services
70.With a SydneyPass,a traveller canA.
A.save fares from and to the airport
B.take the Sydney Explorer to beaches
C.enjoy the famous seafood for free
D.reserve seats easily in a restaurant
71.If 5-day tickets were to be recommended to a mother who travelled with her colleague and
her children,aged 3,6and 10,what would the lowest cost be?C
A.225.
B.300.
C.360.
D.420.
A. | to look | B. | looking | C. | looked | D. | look |
travelers during the upcoming Spring Festival holiday.( )
A. | coping with | B. | coped with | C. | cope with | D. | to cope with |
A. | that | B. | what | C. | which | D. | when |