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
An animal species becomes extinct when it fails to produce enough young in each generation to keep pace with the death-rate. We
An animal species becomes extinct when it fails to produce enough young in each generation to keep pace with the death-rate. We
admin
2011-03-01
28
问题
An animal species becomes extinct when it fails to produce enough young in each generation to keep pace with the death-rate. We can【C1】______from fossil evidence in rocks that many living species have become extinct over the millions of years【C2】______life began. It is a natural【C3】______and extinction is the【C4】______of any animal that has specialized too far to change【C5】______its environment changes, or has to compete with a better-【C6】______and more powerful animal.【C7】______remarkable technical developments during the past few centuries, man has destroyed or【C8】______destroyed some species by killing them【C9】______such a rate that they couldn’t produce enough offspring, or by completely changing their natural environment at surprising speed.
A number of examples can be given of the way【C10】______which natural environments are being rapidly changed—Amazonia, for instance. There is every【C11】______that many species of animals will be made extinct because of these and similar【C12】______of natural vegetation. Large numbers of animals have been hunted and killed for food. The North American buffalo is a【C13】______of the near-extinction of a species through hunting. Often the numbers are【C14】______great that the hunters may not realize the danger. But even when the danger is widely【C15】______, the financial rewards for the hunters may be so great that they choose to【C16】______the threat to the species. Attitudes like this have【C17】______to hunters killing animals for furs, for ivory or merely for ornaments. A slight【C18】______on this is when tourists hunt animals for trophies. Such magnificent creatures【C19】______lions and tigers【C20】______out of existence in some parts of the world.
【C9】
选项
A、at
B、over
C、to
D、for
答案
A
解析
考察介词,以…速率的介词搭配为at a rate,所以选A。
转载请注明原文地址:https://jikaoti.com/ti/MZWsFFFM
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Whatisthemaninterestedinatthebeginningoftheconversation?
Readthetextsfromamagazinearticleinwhichfivewomentalkedabouttheirslimmingfailures.ForQuestions61to65,matc
AspeciallabattheUniversityofChicagoisbusyonly【C1】______Itisadream【C2】______whereresearchersareatwork【C3】______d
AspeciallabattheUniversityofChicagoisbusyonly【C1】______Itisadream【C2】______whereresearchersareatwork【C3】______d
Astheconversationbegins,whatarethemanandwomandoing?
Humanityusesalittlelessthanhalfthewateravailableworldwide.Yetoccurencesofshortagesanddroughts(干旱)arecausingfa
Finishingteacher’sevaluationsneedmaturityandobjectivity.Everysemesterwehavetheopportunitytoevaluateourinstruct
Whatisthepurposeofthispassage?
WhatisMr.Bush’smainpurposeofthetrip?
WhatisMr.Bush’smainpurposeofthetrip?
随机试题
抗原与抗体结合发生交叉反应的原因是
男性,35岁。因甲亢手术,术后当日病人突然咳嗽,随即呼吸紧迫,呼吸极度困难,面色青紫,颈部高度肿胀,伤口引流片引出少量鲜红色血液。考虑当前病人出了什么问题
施工现场平面布置图应包括的基本内容有()。
下列各项,构成工业企业外购存货入账价值的有()。
我国正处在并将长期处在社会主义初级阶段,初级阶段就是不发达的阶段,这个“不发达”首先当然是指生产力的不发达。因此,我们一定要毫不动摇地坚持以经济建设为中心,大力发展生产力,但讲初级阶段,不光要讲生产力的不发达,还要讲社会主义制度的不够完善和不够成熟,巩固和
2013年6月11日17时38分许,搭乘3名中国航天员的神舟十号载人飞船,从酒泉卫星发射中心成功发射。三名航天员再次访问天宫一号。执行载人空间各项科学实验任务。从人类实践的构成要素看。承担此次任务的“神舟十号”载人飞船属于
Oneproblemwithmuchpersonalityresearchisthatitexaminesandrateswhatevertraitstheresearchersareinterestedinatth
电子商务活动常常涉及资金的转移和流动,其中______。
HowwillthemangotoBeijingZoo?
Everyonearrivingatahospital’semergencyroom(ER)wishestobeseenquickly,butforstrokepatientsitcanbeamatterofl
最新回复
(
0
)