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
The Earth has been stripped of up to 90% of its species five times before in the past 450 million years. Now it’s about to happe
The Earth has been stripped of up to 90% of its species five times before in the past 450 million years. Now it’s about to happe
admin
2015-01-31
39
问题
The Earth has been stripped of up to 90% of its species five times before in the past 450 million years. Now it’s about to happen again—and this time there’s no rogue asteroid(小行星)to blame. One of the first great rules of terrestrial biology is that no species is forever. The Earth has gone through five major extinction events before. The result of all of the extinctions was the same: death, a lot of it.
As increasingly accepted theories have argued—and as the Science papers show— we are now in the midst of the sixth great extinction, the unsettlingly-named Anthropocene(人类纪), or the age of the humans.
As the authors of all this loss, we are doing our nasty work in a lot of ways. Overexploitation—which is to say killing animals for food, clothing or the sheer perverse pleasure of it—plays a big role. So we get elephants slaughtered for their tusks, rhinos poached(偷猎)for their horns and tigers shot and skinned for their pelts, until oops— no more elephants, rhinos or tigers.
Habitat destruction is another big driver, particularly in rainforests. And you don’ t even have to chop or burn an ecosystem completely away to threaten its species; sometimes all it takes is cutting a few roads across it or building a few farms or homes in the wrong spots.
Then too there is global warming, which makes once-hospitable habitats too hot or dry or stormy for species adapted to different conditions. Finally, as TIME’s Bryan Walsh wrote in last week’ s cover story, there are invasive species—pests like the giant African snail, the lionfish—which hitch a ride into a new ecosystem on ships or packing material, or are brought in as pets, and then reproduce wildly, crowding out native species.
It oughtn’ t to take appealing to our self-interest to get us to quit making such a mess of what we ’re increasingly coming to learn is an exceedingly destructible world. But it’ s that very self-interest that led us to make that mess in the first place. We can either start to change our ways, or we can keep going the way we are—at least until the Anthropocene extinction claims one final species: our own.
According to the Bryan Walsh’ s view, which statement is NOT correct?
选项
A、The local species extinct because the ecosystem is too crowd.
B、The number of the invasive species increases easily.
C、The invasive species are from other places.
D、The invasive species killed the local animals, which causes the extinction.
答案
D
解析
细节题。细节的位置在“there are invasive species…which hitch a ride into anew ecosystem on ships or packing material,or are brought in as pets,and thenreproduce wildly,crowding out native species”,介绍了入侵物种的来源和危害,都由船或包装物或作为宠物带来,迅速繁殖,进而挤走了本地生物。A、B、C在句中都可以找出,D错在入侵物种不一定是吃掉了本地物种。
转载请注明原文地址:https://kaotiyun.com/show/jAq7777K
0
大学英语四级
相关试题推荐
PresidentRichardNixonusedtosaythatthefirstcivilrightofeveryAmericanistherighttobefreeromdomesticviolence.
A、Heliveslongerthanexpected.B、Hecanmanagehislifethroughhiscomputer.C、Heisconsideredastheleadingcosmologist.D
Byimposingstrictrulesaboutalcohol,parentscanreducetheirkids’impulsestodrink,accordingtoanewstudy.【C1】_____
Inanewarticle,fourLondondoctorswarnofaprofessionalwhoiscommittingmalpracticeandgettingawaywithit:thetoothf
Populationsofwell-lovedspeciessuchastheturtledove,nightingaleandcuckoo,whichcometobreedintheUKandtheContine
A、Theadvertisementisprintedfineandattractivetoreaders.B、$200isreallyreasonableforaroundtripbetweenLAandNY.C、
Everybodywantstogetwealthy.Intoday’s【B1】______world,makingmoneyorbecomingwealthysymbolizesaperson’ssuccessandc
Ofallthelessonstaughtbythefinancialcrisis,themostpersonalhasbeenthatAmericansaren’tsogoodatmoney-management.
Globalwarmingiscausingmorethan300,000deathsandabout$125billionineconomiclosseseachyear,accordingtoareportby
A、Becausethedemandforfoodincreased.B、Becausebadweathercausedthethreatoffoodshortage.C、Becausetheproductionoff
随机试题
A.仓廪之官,五味出焉B.中正之官,决断出焉C.受盛之官,化物出焉D.相傅之官,治节出焉E.作强之官,伎巧出焉
功似石决明,又能镇惊安神的药物是
A.活跃期延长B.活跃期停滞C.胎头下降延缓D.第二产程停滞E.第二产程延长初产妇,规律宫缩5小时,宫口开3cm,行人工破膜后9小时宫口9cm。为
患儿男,14个月,因“发热、流涕2日”就诊。查体:体温39.7℃,脉搏135次/分。神志清楚,咽部充血,心肺检查无异常。查体时患儿突然双眼上翻,四肢强直性、阵挛性抽搐。引起患儿病情变化的原因,最可能是()
关于混凝土施工缝的留置位置的做法,正确的是()。
按库存在企业中所处状态不同划分,那些已经有一段时间没有需求的商品属于()。
甲股份有限公司(以下简称“甲公司”)为上市公司,其相关交易或事项如下(计算结果保留两位小数)。(1)经相关部门批准,甲公司于2×19年1月1日按面值发行分期付息、到期一次还本的可转换公司债券1000万份,每份面值为100元。可转换公司债券发行价格总额为1
导游服务是一门艺术,它集()艺术于一身,集中体现在导游讲解之中。
有以下程序main(){intsum,pad,pAd;sum=pad=5;pAd=++sum,pAd++,++pad;printf(”%dkn”,pad);)程序的输出结果是
若整型变量a、b、c、d中的值依次为:1、4、3、2。则条件表达式a<b?a:c<d?c:d的值是()。
最新回复
(
0
)