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
29
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.
【C2】
选项
A、after
B、until
C、since
D、before
答案
C
解析
根据上下文,此处应用since“自从”最为合适。
转载请注明原文地址:https://kaotiyun.com/show/Iojd777K
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
Readthefollowingarticleinwhichfivepeopletalkabouttheirideasofmarriage.Forquestions61to65,Matchnameofeachs
Whatisthemaintopicoftheconversation?
ReadthefollowingtextsfromanarticleinwhichpeopletalkedaboutEnglishstudy.Forquestions61to65,matchthenameofe
Whataretheman’shobbies?
WhatisMr.Bush’smainpurposeofthetrip?
Finishingteacher’sevaluationsneedmaturityandobjectivity.Everysemesterwehavetheopportunitytoevaluateourinstructor
YouarerequiredtowriteacompositiononCanRoadAccidentsBeAvoided?Inthreeparagraphswiththefirstsentenceofeachpa
WhatisMr.Bush’smainpurposeofthetrip?
What’sthewomansuggestingtotheman?
What’sthewomansuggestingtotheman?
随机试题
氢化物原子荧光法测砷的最低检测质量是()。
关于气滞证,在辨证时其常见证候有
A.α射线B.β射线C.γ射线D.红外线E.紫外线
A、草麻黄B、中麻黄C、木贼麻黄D、生麻黄E、蜜麻黄多分枝,有粗糙感,节间长2~6cm,鳞叶裂片3(稀2),髓部呈三角状圆形()
分散采购的优点是()。
内存储器存储数据的速度比外存储器要快得多。()
注册会计师甲和乙在审计D公司年度会计报表时,注意到与购货和付款循环相关的内部控制存在缺陷。他们认为D公司管理当局在资产负债表日故意推迟记录发生的应付账款,于是决定实施审计程序进一步查找未入账的应付账款。请问注册会计师甲和乙应如何查找未入账的应付账款?
甲公司为通讯服务运营企业,2006年12月交易事项如下:(1)2006年12月1日,甲公司举办预存话费送手机活动,预存5000元话费,赠送市价2400元,成本价1700元的手机一部。从活动当月起未来24个月,每月享受价值150元,成本90元的
DearSir/Madam,Inresponsetoyouradvertisementinyesterday’sTimeEducationalSupplement,Iwouldliketoapplyforthe
Obama’sSuccessIsn’tAllGoodNewsforBlackAmericansAsErinWhitewatchedtheelectionresultsheadtowardsvictoryfor
最新回复
(
0
)