首页
登录
职称英语
Because dinosaurs were reptiles, scientists once assumed that, like all reptiles
Because dinosaurs were reptiles, scientists once assumed that, like all reptiles
游客
2024-01-13
63
管理
问题
Because dinosaurs were reptiles, scientists once assumed that, like all reptiles alive today, dinosaurs were coldblooded. The recent discovery of dinosaur fossils in the northern arctic, however, has led a number of researchers to conclude that at least some dinosaurs might have been warmblooded. These researchers point out that only warm-blooded animals could have withstood the frigid temperature that are characteristic of arctic winters, whereas cold-blooded animal would have frozen to death in the extreme cold. Which one of the following, if true, weakens the researchers’ argument?
选项
A、Today’ s reptiles are generally confined to regions of temperate or even tropical climates.
B、The fossils show the arctic dinosaurs to have been substantially smaller than other known species of dinosaurs.
C、The arctic dinosaur fossils were found alongside fossils of plants known for their ability to withstand extremely cold temperatures.
D、The number of fossils found together indicates herds of dinosaurs so large that they would need to migrate to find a continual food supply.
E、Experts on prehistoric climate conditions believe that winter temperatures in the prehistoric northern arctic were not significantly different from what they are today.
答案
D
解析
读题以后不难发现本题的结论是以史前时代北极地区的气温与今天的相比无明显差别以及化石被科学家们在北极发现的恐龙生前就一直栖息在北极为前提.选项(D)通过找他因,削弱了本题结论的前提,因此(D)是正确答案;(E)对结论构成支持;(A)、(B)和(C)均为无关选项。
转载请注明原文地址:https://tihaiku.com/zcyy/3358611.html
相关试题推荐
ThepeopleatthepartywereworriedaboutJohnbecausenoonewasaware_______
Itwasbecauseitrainedheavilylastnight________hedidn’tcometotheevening
Someconceptsmaybedifficulttograspchieflybecausetheymaybeunfamiliaro
Itwasonceassumedthatalllivingthingscouldbedividedintotwofundamental
Ourcriminaljusticesystemisinherentlyflawedbecauseitreliesonamateurju
WhenA.PhilipRandolphassumedtheleadershipoftheBrotherhoodofSleepin
WhenA.PhilipRandolphassumedtheleadershipoftheBrotherhoodofSleepin
WhenA.PhilipRandolphassumedtheleadershipoftheBrotherhoodofSleepin
Itwasonceassumedthatalllivingthingscouldbedividedintotwofundame
Itwasonceassumedthatalllivingthingscouldbedividedintotwofundame
随机试题
WhatIsLiteraryWriting?I.Distinguishingfeaturesofli
[originaltext]M:InthisepisodeofMoneyTalks,ourguestisMollySanders,a
【B1】[br]【B6】[originaltext]Scientistshavedevelopedanewcancerdrug.So
产生类骨质的细胞是A、软骨细胞 B、骨原细胞 C、成骨细胞 D、骨细胞
少尿或无尿休克病人禁用A.去甲肾上腺素 B.间羟胺 C.阿托品 D.
孕妇,38岁,第二胎,孕35周,重度子痫前期,护士在配合确定终止妊娠时机之前,不
与Ⅱ型超敏反应无关的成分是A.IgM/lgGB.补体C.NK细胞D.吞噬细胞E.
根据热力学第二定律判断下列哪种说法是正确的。 (A)热量能从高温物体传到低温物
(2021年真题)下列资产负债表项目中,应根据多个总账科目期末余额合计填列的是(
对巨噬细胞具有抑制作用的细胞因子是 ACSF BIL-2 CIFN一γ”
最新回复
(
0
)