首页
登录
职称英语
[originaltext] Human beings are cutting down the world’s rain forests at the
[originaltext] Human beings are cutting down the world’s rain forests at the
游客
2023-07-24
57
管理
问题
Human beings are cutting down the world’s rain forests at the rate of 20 hectares a minute (31) . Every year, 30 million hectares of rain forests are destroyed. And at this rate, most of the world’s rain forests will disappear very soon.
The forests are cut down sometimes for wood, sometimes for farms so that crops and vegetables can be planted and sometimes to make way for roads. But the forests do not re-grow. The soil is very thin and it is soon washed away by the rain. The land is then too poor for the forests to begin to grow again.
There are a number of good reasons for saving the rainforests. Several important drugs in hospitals have come from the rain forests. Also they produce food. The rain forests are rich in wildlife, too. They cover less than 10% of the world’s land, but they contain 40%~50%of the world’s species of plants and animals (29) . The trees supply oxygen. If the rain forests are destroyed, this will change the world’s weather (30) . Temperatures will go up, sea levels will rise and there will be changes in rain and snowfall.
Today, research studies in forests in Panama, New Guinea and Indonesia may help us to find solutions to save the world’s rain forests.
选项
A、15%.
B、10%.
C、About 50%.
D、Nearly 30%.
答案
C
解析
题目问热带雨林包含了世界上多少植物品种。短文中提到"They cover less than 10% of the world’s land,but they contain 40%~50% of the world’s species of plants and animals",可见热带雨林包含了40%~50%的物种,显然C) 符合。
转载请注明原文地址:https://tihaiku.com/zcyy/2865993.html
相关试题推荐
[originaltext]M:Idon’tthinkyouhavetimetosendouttheinvitationstoall
[originaltext]M:Idon’tthinkyouhavetimetosendouttheinvitationstoall
[originaltext]M:Idon’tthinkyouhavetimetosendouttheinvitationstoall
[originaltext]M:Idon’tthinkyouhavetimetosendouttheinvitationstoall
[originaltext]W:Look,somanypeoplearecrowdingthroughthegatesintothee
[originaltext]W:Look,somanypeoplearecrowdingthroughthegatesintothee
[originaltext]W:Look,somanypeoplearecrowdingthroughthegatesintothee
[originaltext]M:MathDepartment,DoctorWebsterspeaking.W:Hello,Prof.Webs
[originaltext]M:MathDepartment,DoctorWebsterspeaking.W:Hello,Prof.Webs
[originaltext]W:Mymeetingfinishesatquartertoseven.ButI’lltrytobeth
随机试题
ChristianitywasfirstintroducedintoBritainby______.A、theCeltB、theRomans
下面关于重力坝的应力计算的叙述,符合规范要求的有( )。A.重力坝的坝基面坝趾
原子轨道组成分子轨道的原则是:对称性原则、_______原则、_______原则
广大文艺工作者要把人民满意不满意作为检验艺术的最高标准。()
西藏自治区是以藏族为主的多民族聚居区。下列少数民族中,属于西藏的本土民族的有(
吴茱萸具有的功效是A.温中回阳,散寒止痛,纳气平喘 B.祛寒止痛,理气和胃
一个边长为1的正方体能刨成的最大的正四面体体积为:()A. B. C.1
某10年前建成的小型办公楼建筑面积为1500m2,层高为4.1m,土地剩余使用期
表格中“?”处应为:A.-17.8% B.-14.1% C.-7.7
关于垫资施工合同的价款纠纷处理,下列说法中正确的是( )。A.当事人对垫资利息有
最新回复
(
0
)