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
2023-01-24
52
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."
【C17】
选项
A、lead to
B、tend to
C、stick to
D、object to
答案
B
解析
本句说明就繁殖频率而言,大型动物会比小型低。根据常识可知,这样的说法不是绝对的,有可能存在某种大型动物的繁殖率跟某种小型动物一样、甚至是比某种小型动物还高的情况。B项tend to do sth.“倾向于做某事”,说明这是一种普遍的而非绝对的说法,符合语义逻辑。A项lead to“导致”,表示前者的发生而使得后面现象的出现,不符合本空格逻辑。动物不会slick to“坚持”或object to“反对”繁殖更少,因此C项、D项不对。
转载请注明原文地址:https://kaotiyun.com/show/dPMD777K
0
考研英语二
相关试题推荐
Nobodyeverproteststhatanelementaryschoolshouldbedescribedas"manned"insteadof"staffed,"butdaretosuggesta"men
Nobodyeverproteststhatanelementaryschoolshouldbedescribedas"manned"insteadof"staffed,"butdaretosuggesta"men
Nobodyeverproteststhatanelementaryschoolshouldbedescribedas"manned"insteadof"staffed,"butdaretosuggesta"men
EnrollmentinLosAngelespublicschoolsisexpectedtoplungebynearly30%overthenextdecade,leadingtotoughchoicesahea
EnrollmentinLosAngelespublicschoolsisexpectedtoplungebynearly30%overthenextdecade,leadingtotoughchoicesahea
Weighingyourselfregularlyisawonderfulwaytostayawareofanysignificantweightfluctuations.【C1】________,whendonetoo
Weighingyourselfregularlyisawonderfulwaytostayawareofanysignificantweightfluctuations.【C1】________,whendonetoo
Weighingyourselfregularlyisawonderfulwaytostayawareofanysignificantweightfluctuations.【C1】________,whendonetoo
随机试题
正始时期辞赋创作风貌的新变及其成因。
下述不属于抗:ENA抗体的是()(2006年)
累及肺腺泡各部分的肺气肿为
特发性肺纤维化在高分辨率CT的改变有
女性,60岁,因严重的呼吸困难和喘鸣来急诊。她一直吸入β2选择性药物和吸入糖皮质激素治疗哮喘,西咪替丁治疗十二指肠溃疡,肺功能显示FEV1和PEFR(呼气短流速)都小于预计值40%,PaO255mmHg,PaCO240mmHg,对她的治疗恰当的陈述应是
男,35岁。发热时眼痛、腹泻半天。查体:T39.2℃,BP120/70mmHg,腹软,左下腹压痛(+),反跳痛(一)。实验室检查:血WBC12×109/I,N0.85,L0.15。粪镜检WBC40/HP,RBC2/HP。最可能的诊断是
安全阀与爆破片装置并联组合时,爆破片的标定爆破压力不得()容器的设计压力。安全阀的开启压力应略()爆破片的标定爆破压力。
设A为n阶矩阵,λ1和λ2是A的两个不同的特征值.x1,x2是分别属于λ1和λ2的特征向量,试证明:x1+x2不是A的特征向量.
Youarewhatyoueat,orsothesayinggoes.ButRichardWrangham,ofHarvardUniversity,believesthatthisistrueinamorep
Directions:Readthepassage.Thenanswerthequestions.Giveyourself20minutestocompletethispracticeset.
最新回复
(
0
)