首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、One acre per minute. B、One acre per second. C、One hundred acres per minute. D、Two hundred acres per hour. C
A、One acre per minute. B、One acre per second. C、One hundred acres per minute. D、Two hundred acres per hour. C
admin
2017-11-08
46
问题
Rainforests circle the globe for twenty degrees of latitude on both sides of the equator. In that relatively narrow band of the planet, more than half of all the species of plants and animals in the world make their home. Several hundred different varieties of trees may grow in a single acre, and just one of those trees may be the habitat for more than ten thousand kinds of spiders, ants, and other insects. More species of amphibians, birds, insects, mammals, and reptiles live in rainforests than anywhere else on Earth.
Unfortunately, half of the world’s rainforests have already been destroyed, and at the current rate, another 25 percent will be lost by the year 2010. Scientists estimate that as many as fifty million acres are destroyed annually. In other words, every sixty seconds one hundred acres of rainforest is being cleared. By the time you finish listening to this passage, two hundred acres will have been destroyed! When this happens, constant rains erode the former forest floor, the thin layer of soil no longer supports plant life, and the ecology of the region is altered forever. Thousands of species of plants and animals are condemned to extinction and, since we aren’t able to predict the consequences of this loss to a delicate global ecology, we don’t know what we may be doing to the future of the human species as well.
Questions 19 to 21 are based on the passage you have just heard.
19. Where do more than half of all the species of plants and animals live?
20. What is the current rate of destruction?
21. What will not happen if the rainforest continues to be cleared?
选项
A、One acre per minute.
B、One acre per second.
C、One hundred acres per minute.
D、Two hundred acres per hour.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/hma7777K
0
大学英语四级
相关试题推荐
Hollywoodhasamessageforscientists:Ifyouwantsomethingthat’s100%accurateineveryway,gowatchadocumentary.Thethi
HowsciencegoeswrongScientificresearchhaschangedtheworld.Nowitneedstochangeitself.A)Asimpleideaunderli
A、Giveupregistrationandleave.B、Talktotheadmissionsrepresentative.C、Gotothelibraryimmediately.D、Waituntilthewom
A、Becausetheywanttoreturntothejobmarket.B、Becausetheywanttolearnsomethingnew.C、Becausetheywanttomakeupfor
A、Mysteriesanddetectivestories.B、Novelsandstories.C、Historyandsciencebooks.D、Booksoncultureandtradition.B录音提到,超过
A、Tobuildfires.B、Toconductscientificstudies.C、Totrainotherstaffmembers.D、Tohelpvisitorswithanydifficulty.D
A、Afraid.B、Excited.C、Curious.D、Indifferent.A短文说,最初,人类和其他动物一样很可能也怕火。A正确。Atfirst引导的语义强调之处出题,四个选项都为表示心理活动的形容词,听到什么选什么。
A、Afraid.B、Excited.C、Curious.D、Indifferent.A短文说,最初,人类和其他动物一样很可能也怕火。A正确。Atfirst引导的语义强调之处出题,四个选项都为表示心理活动的形容词,听到什么选什么。
A、Checkyournumberandcallagain.B、Telltheoperatorwhathashappened.C、Asktheoperatortoputyouthrough.D、Asktheoper
A、Hefeelsitisquitesatisfactory.B、Heissureitwillhaveabrightfuture.C、Hethinksitiskindofdisappointing.D、Hebe
随机试题
社区关系指()
DNA复制需要:①DNA聚合酶Ⅲ;②解链蛋白;③DNA聚合酶Ⅰ;④DNA指导的RNA聚合酶;⑤DNA连接酶。其作用的顺序是
A.重金属B.阿托品C.四氯化碳D.有机溶剂E.一氧化碳
患者女,40岁。四肢小关节疼痛,肿大僵硬,发热,活动受限1年半,加重2个月人院。关节腔积液检查:柠檬色、浑浊,白细胞3562×106/L,葡萄糖4.30mmol/L,患者最可能的诊断是
小儿正常指纹的显露部位为
中国证监会及其派出机构可以根据审慎监管原则,要求财务顾问提供已按照《上市公司并购重组财务顾问业务管理办法》的规定履行尽职调查义务的证明材料、工作档案和工作底稿,并对财务顾问的()等方面进行非现场检查或者现场检查。Ⅰ.公司治理Ⅱ.内部
甲乙丙三箱水果,甲与乙的重量之比为3:4.甲与丙的重量之比为5:2,从乙箱取4千克放入丙箱,乙丙重量之比为9:4,则甲、乙、丙三箱重量之和为多少千克?
语言是一种符号系统。任何符号都包含形式和意义两方面。在语法系统里,基本符号是语素,它被定义为“最小的有意义的语言成分”。例如“我喜欢吃葡萄”里的“我”“喜”“欢”“吃”都有意义,而且都不能分割成更小的有意义的单位了,所以它们都是语素;“葡”和“萄”只有合在
设总体X~B(m,θ),X1,X2,…Xn为来自该总体的简单随机样本,为样本均值,则E=
Don’ttalk:yourcellphonemaybeeavesdropping.Thankstorecentdevelopmentsin"spyphone"software,ado-it-yourselfspook
最新回复
(
0
)