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
考研
In his 1979 book, The Sinking Ark, biologist Norman Myers estimated that (1)_____ of more than 100 human-caused extinctions occu
In his 1979 book, The Sinking Ark, biologist Norman Myers estimated that (1)_____ of more than 100 human-caused extinctions occu
admin
2010-05-05
74
问题
In his 1979 book, The Sinking Ark, biologist Norman Myers estimated that (1)_____ of more than 100 human-caused extinctions occur each day, and that one million species (2)_____ by the century’s end. Yet there is little evidence of (3)_____ that number of extinctions. For example, only seven species on the (4)_____ species list have become extinct (5)_____ the list was created in 1973.
Bio (6)_____ is an important value, according to many scientists. Nevertheless, the supposed mass extinction rates bandied about are (7)_____ by multiplying (8)_____ by improbables to get imponderables.
Many estimates, for instance, rely a great deal on a "species-area (9)_____", which predicts that twice as many species will be found on 100 square miles (10)_____ on ten square miles. The problem is that species am not distributed (11)_____, so how much of a forest am destroyed may be as important as (12)_____.
(13)_____, says Ariel Lugo, director of the International Institute of Tropical Forestry in Puerto Rico, "Biologists who predict high (14)_____ rates (15)_____ the resiliency of nature".
One of the main muses of extinctions is deforestation. According to the Consultative Group on International Agricultural Research, what destroys tropical trees is not commercial logging, (16)_____ "poor farmers who have no other (17)_____ for feeding their families than slashing and burning a (18)_____ of forest".
In countries that practice modern (19)_____ agriculture, forests are in (20)_____ danger. In 1920, U.S. forests covered 732 million acres. Today they cover 737 million.
选项
A、where
B、what
C、as
D、from
答案
C
解析
as。注意twice as many as被分开了。看到前面有twice times as时就应想到后面应有as引导的被比较成分。
转载请注明原文地址:https://kaotiyun.com/show/0P44777K
0
考研英语一
相关试题推荐
AstudypublishedinTheNewEnglandJournalofMedicineestimatedthatthereareanaverageof30in-flightmedicalemergencies
AstudypublishedinTheNewEnglandJournalofMedicineestimatedthatthereareanaverageof30in-flightmedicalemergencies
Itisestimatedthat______ofUSworkforceismadeupofundocumentedimmigrants.TheexampleoftheyoungmaninWashingtonD
Itisestimatedthat______ofUSworkforceismadeupofundocumentedimmigrants.Accordingtothetext,ifallthenewcomers
KarlVonLinne(orLinnaeus,asheiswidelyknown)wasaSwedishbiologistwhodevisedthesystemofLatinisedscientificnames
KarlVonLinne(orLinnaeus,asheiswidelyknown)wasaSwedishbiologistwhodevisedthesystemofLatinisedscientificnames
KarlVonLinne(orLinnaeus,asheiswidelyknown)wasaSwedishbiologistwhodevisedthesystemofLatinisedscientificnames
KarlVonLinne(orLinnaeus,asheiswidelyknown)wasaSwedishbiologistwhodevisedthesystemofLatinisedscientificnames
随机试题
慢性食管炎膳食治疗应选择
下列有关咨询工程师的叙述中正确的是()。
2014年新华中学初三(3)班期末考试成绩表注:语、数、英满分150分,90分为合格线;政、理、化满分100分,60分为合格线;体育满分60分。“六总”为除体育外六门课总成绩,“七总”为七门课总成绩,班名次按“七总”计算。如将“七总”成绩前20名的
学术大师季羡林曾言:“我们讲和谐,不仅要人与人和谐,人与自然和谐,还要人内心和谐。鉴于此我把人文关怀的层次分析成人与自然、人与人以及人自身思想情感处理等三种关系,如果这三种关系处理得当,人就幸福愉快,否则就痛苦。”“内心和”概念的提出,反映出(
根据我国刑法规定,下列关于首要分子的表述哪一项是正确的?
(2009年第1题)阅读下面短文,回答下列问题:在奥运会开幕式上,刘欢和莎拉.布莱曼演唱的主题曲《我和你》,音调悠扬婉转,意韵绵长。这几天常常在大街小巷听到这首歌,渐渐也熟悉了这旋律。熟悉一首歌是重要的,越听越会觉得平和中自有真挚的感情流露。这首歌的歌词
下列关于英国宪法和宪政的表述,错误的是()。
下列关于Winmail邮件服务器在快速设置向导中新建邮箱user@mail.abc.con时的描述中,错误的是()。
A、$3.99.B、$5.50.C、$6.99.D、$9.50.A
A、Gotoamovie.B、Workinalibrary.C、Visitamuseum.D、Speedsometimeoutdoors.D
最新回复
(
0
)