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、They live in twenty rainforests. B、They live in several hundred different varieties of trees. C、They live in a forty-degree ba
A、They live in twenty rainforests. B、They live in several hundred different varieties of trees. C、They live in a forty-degree ba
admin
2017-11-08
94
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、They live in twenty rainforests.
B、They live in several hundred different varieties of trees.
C、They live in a forty-degree band of latitude.
D、They live in areas where the rainforest has been cleared.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/Qma7777K
0
大学英语四级
相关试题推荐
Forthispart,youareallowed30minutestowriteashortessaybasedonthepicturebelow.Youshouldstartyouressaywitha
TheEndofAIDS?A)OnJune5th1981America’sCentresforDiseaseControlandPreventionreportedtheoutbreakofanunusualfor
A、TheinfluencefromAsiancountries.B、Thegrowingcompetitionfromforeignstudents.C、Thegrowingcompetitionforentrancein
A、Tonight.B、Intwohours.C、Tomorrow.D、Inafewminutes.C对话中,女士提到数学作业明天就要交了(theassignment’sduetomorrow),其中的due指“到期,到预定的时间”,
TheInternetisaninternationalcollectionofcomputernetworksthatallunderstandastandardsystemofaddressesandcommands
HenryIIIdidn’tknowmuchaboutbiology.Hewentthroughsixwivesbackinthe1500s,lookingforonewhocouldbearhimason.
A、Tobuildfires.B、Toconductscientificstudies.C、Totrainotherstaffmembers.D、Tohelpvisitorswithanydifficulty.D
A、Hewillbewiththemwhenevertheyneedadvice.B、Hewillberesponsibleforthequalityofwhathesells.C、Hewilldelivert
A、Romantic.B、Simple.C、Ceremonial.D、Extravagant.C
A、Hewantedtofindaplacetoreadhispapers.B、Hewantedtokilltimebeforeboardingtheplane.C、Hefeltthirstyandwanted
随机试题
肉眼观察脑标本表面,脑萎缩的特征性改变是
哪一项不是脉络膜黑色素瘤的超声表现
西药治疗淋病,方法不正确的是
城市道路非机动车道主要按()车道设计。
鲜花花篮
由投资者投资转入的固定资产,应按投资合同或协议约定的价值(假定该价值公允)作为固定资产的入账价值,借记“固定资产”科目,按其在注册资本中所占的份额,贷记“实收资本”或“股本”科目,按其差额记入的会计科目是()。
中央银行的主要业务是()。
根据个人所得税法律制度的规定,下列各项中,应征收个人所得税的是()。
下列属于经常转移的项目有()。
课外活动与课堂教学的共同之处在于它们都是()教育活动。
最新回复
(
0
)