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
Should we care if over 150 known species of animals have【1】from the earth in the last fifty years? Should we be concerned that t
Should we care if over 150 known species of animals have【1】from the earth in the last fifty years? Should we be concerned that t
admin
2013-11-24
18
问题
Should we care if over 150 known species of animals have【1】from the earth in the last fifty years? Should we be concerned that there are【2】thousands of species whose very existence is【3】endangered—largely because of our activities?【4】, after all, is the natural end of populations. Species are born, then【5】, and then die. Some live a【6】time, perhaps millions of years; some die more quickly. We have【7】the extinction of many species we know about, and we have undoubtedly sealed the【8】of others. In fact, there are undoubtedly many other species that have lived among us during our time on earth, but that have disappeared as a(n)【9】of our activities without our ever having known they existed.
It is hard to explain the rationale of many of us who are concerned about such matters. I have never seen a sea whale,【10】I don’t want them to become extinct. Moreover, I felt this way long before I understood anything about how they might be an important part of an ecosystem. Possibly such feelings merely reflect the cultural attitude that it is "nice" to wish other living things well; thus, the attitude is【11】.I feel nice.
There are, of course, more rational reasons for【12】the extermination of any species. For one thing, the kind of attitude that encourages or sanctions the destruction of other species is a threat【13】our own wellbeing. If such an attitude exists, we ourselves might【14】victim to it. Living things(including us)might be expected to fare better where there is【15】for life. The extinction of other species could also threaten us【16】by simplifying the system of which we are a part or by destroying parts of the ecosystem【17】which we directly rely. For example, if we continue to poison the oceans【18】we are willing to believe only a few bottom dwellers are affected, we might【19】overstep some critical threshold and trigger the wholesale death of plankton, thus finding ourselves without a major【20】of the world’s food and with|our oxygen supplies dwindling.
【10】
选项
A、still
B、yet
C、also
D、then
答案
B
解析
能用在此位置的连词只有yet和then,但句子前后显然不是先后顺序关系,所以用yet。
转载请注明原文地址:https://kaotiyun.com/show/wfmO777K
0
考博英语
相关试题推荐
Nowthepublichasanunprecedentedchancetopeerovertheshouldersofarchaeologistsandhistoriansandgetafirsthandlook
Forlaymenethnologyisthemostinterestingofthebiologicalsciencesfortheveryreasonthatitconcernsanimalsintheirno
Perhapsallcriminalsshouldberequiredtocarrycardswhichread;Fragile;HandlewithCare.Itwillneverso,thesedaystog
Scienceisadominantthemeinourculture.Sinceittouchesalmosteveryfacetofourlife,educatedpeopleneedatleastsome
Scienceisadominantthemeinourculture.Sinceittouchesalmosteveryfacetofourlife,educatedpeopleneedatleastsome
Weseekasocietythathas______arespectforthedignityandworthoftheindividual.
Somecropsarerelativelyhighyieldersandcouldbeplantedinpreferencetoothersto______thefoodsupply.
Theevolutionofsexratioshasproduced,inmostplantsandanimalswithseparatesexes,approximatelyequalnumbersofmalesa
Onlyrecently______possibletoseparatethecomponentsoffragrantsubstancesandtodeterminetheirchemicalcomposition.
71.Asaromanticteenager,IbelievedthatmyfuturelifeasascientistwouldbejustifiedifIcoulddiscoverasinglenewfac
随机试题
校准实验室对所有的校准都应具有并应用评定测量()的程序。
有关肠梗阻的说法下列选项中错误的是
受精卵在第3日分裂成桑葚胚的细胞个数为()。
监控中心的电源应按所在建筑物的最高负荷等级配置,且不低于()负荷,并应保证不间断供电。
关键事件法的特点是()。
项目组织规划过程的主要内容包括________。
比赛中运动员将铅球沿斜上方投掷出去,铅球离手后,在空中飞行过程中动能Ek随时间t的变化图像最接近的是()。
曲线y=x2,x=2,y=2,y=0所围成的图形的面积为().
(2009年单选19)下列关于没收财产刑的说法,正确的是()。
Readthearticlebelowaboutabookletpublishedbyabank.Foreachquestion31-40,writeonewordinCAPITALLETTERSonyourA
最新回复
(
0
)