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
Mammals vary enormously in size, from weighing less than a penny to measuring more than three school buses in length. Some group
Mammals vary enormously in size, from weighing less than a penny to measuring more than three school buses in length. Some group
admin
2017-08-11
25
问题
Mammals vary enormously in size, from weighing less than a penny to measuring more than three school buses in length. Some groups of mammals have become very large, such as elephants and whales,【C1】______others have always been small, like primates. A new theory developed by an international team, led by Jordan Okie,【C2】______an explanation for why and how【C3】______groups of organisms are able to evolve【C4】______sizes, whereas others are not.
The research team【C5】______information on how quickly an individual animal grows and used it to【C6】______how large it may get【C7】______evolutionary time. Their research was published recently.
The new theory developed from the observation that some animals【C8】______fast and die young, while others take their time and mature much later. "Fast" animals-such as mice—breed very quickly, while humans mature slowly and are relatively older when they first have children. The theory【C9】______that those species that are relatively faster are more likely to evolve a large size quicker than slow species, and that their maximum size will be greater.
The research team tested their theory using the【C10】______records of mammals over the last 70 million years, examining the maximum size of each mammal group【C11】______that time, including whales, elephants, seals and primates. They found that their theory was very well【C12】______.
"Primates have evolved very slowly, and never got bigger than 1,000 pounds," said Okie, "The【C13】______was true of whales, which evolved their large size at the fastest【C14】______recorded."
The theory also makes predictions about the relative risks of extinction for large animals【C15】______small. The maximum size of an animal is limited by the rate of mortality in the【C16】______. Because larger animals【C17】______breed less frequently than smaller animals,【C18】______the mortality rate doubles, the maximum size is predicted to be 16 times smaller.
"This is a really surprising【C19】______," said Okie. "It points to another reason why many of the large animals went【C20】______after the last Ice Age, and their high risk of extinction in modern environments."
【C8】
选项
A、live
B、run
C、eat
D、think
答案
A
解析
后半句while表示对比,因此其引导的内容“生长缓慢、成熟晚”应与前半句形成反差,故选择A项live。短语live fast and die young意为“长得快也死得快”。
转载请注明原文地址:https://kaotiyun.com/show/TYbZ777K
0
考研英语一
相关试题推荐
Somepublicationsthatrankschoolsandcollegessaytheydoittopromoteaccountability;otherssaytheydoittoprovideinfo
Somepublicationsthatrankschoolsandcollegessaytheydoittopromoteaccountability;otherssaytheydoittoprovideinfo
TheUnitedStateseconomyproducedroughly$15trillionworthofgoodsandservicesin2008,makingiteasilythelargestinthe
Mr.Porter,aprofessoratHarvardBusinessSchool,isoneoftheworld’smostrespectedbusinessthinkers.Hemadehisnameand
Recentyearshavebroughtminority—ownedbusinessesintheUnitedStatesnotonlyunprecedentedopportunitiesbutalsonewands
Recentyearshavebroughtminority—ownedbusinessesintheUnitedStatesnotonlyunprecedentedopportunitiesbutalsonewands
Theideaisasaudaciousasitaltruistic:provideapersonallaptopcomputertoeveryschoolchild—particularlyinthepoorestp
Optimistsoutlivepessimists,anewstudyshows.Ofnearly100,000women【C1】______intheWomen’sHealthInitiative,thosewhoga
Optimistsoutlivepessimists,anewstudyshows.Ofnearly100,000women【C1】______intheWomen’sHealthInitiative,thosewhoga
随机试题
A.虚热B.虚寒C.两者均有D.两者均无(2000年第115,116题)肺痿的主要病理为()
男性患者,39岁,近半年向心性肥胖,皮肤明显变黑,血皮质醇(8AM)66pmoL/dl(正常值5~25pmol/d1),血ACTH146μU/ml(正常值0~46μ/ml),pH7.46,血钾2.8mmol/L,CT示双侧肾上腺增生,最可能诊断为
初步诊断是本病的主要致病菌不包括
在招标方法和手段中,()与纸质招标相比,将极大提高招标投标效率,符合节能减排要求,降低招标投标费用,有效贯彻“三公”原则,有利于突破传统的招标组织实施和管理模式。
构建证券组合应遵循的基本原则之一是投资者在构建证券组合时应当考虑所选证券是否易于迅速买卖,该原则是()
某企业拟购买一套新设备以扩大生产能力,现有甲、乙两个方案可供选择。(1)甲方案:原始总投资为1000万元,项目计算期为5年,经营期每年所得税后净现金流量500万元。(2)乙方案:原始总投资为1200万元,项目计算期为10年,经营期每
五班四运转的轮休制的循环期为()。
教师威信的维护与发展中,教师要以“艺”强威,下列对“艺”的理解,正确的是()。(2016.广西)
左边给定的是纸盒的外表面,右面哪一项能由它折叠而成?
Accordingtothepassage,thecurrentemergencyinMexicoCityrefersto______.WhichofthefollowingstatementsisNOTTRUEa
最新回复
(
0
)