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
专升本
If half of the water were to be drained from the Pacific Ocean, a curious kind of submarine mountain called a guyot would be exp
If half of the water were to be drained from the Pacific Ocean, a curious kind of submarine mountain called a guyot would be exp
admin
2021-11-11
56
问题
If half of the water were to be drained from the Pacific Ocean, a curious kind of submarine mountain called a guyot would be exposed. Guyots are strange formations that resemble mushroom stalks with flat tops. More than six hundred and fifty of these volcanic stalks have been discovered in the Pacific Ocean, and a few others have been discovered in the Atlantic sea plains.
It is easy to suppose that the guyots were formed by underwater lava spouts that piled up volcanic debris over the years, but just how they acquired their curiously flat tops remains a mystery. Shallow-water fossils found embedded(植入) in the tops of some guyots suggest that at one time the flat tops were much nearer the ocean’s surface, but beyond this there is little that scientists can say.
One attempt to account for the flat tops suggests that the ocean levels were once much lower than they are today; thus wave action might have smoothed away the original peaks. Another theory holds that the guyots have probably always flat tops and that their weight has pushed them slightly toward the ocean floor, causing them to slowly submerge. But these are only theories—the guyots are still a geophysical puzzle.
We can conclude from this passage that________.
选项
A、there are guyots in every ocean of the world
B、guyots are produced by violent volcanic action
C、the mystery of the guyots will soon be solved
D、the guyots’ flat tops will remain a mystery for some time
答案
D
解析
文章中反复出现but just how they acquired their curiously flat tops remains a mystery,but beyond this there is little that scientists can say.But these are only theories一the guyots are still a geophysical puzzle.故选D。
转载请注明原文地址:https://kaotiyun.com/show/7jRC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Manypeoplehavetheexperiencethatgettingupinthemorningissodifficultandpainful.Thismightbecalledlaziness.ButD
Telephone,television,radio,andtheInternethelppeoplecommunicatewitheachother.Becauseofthesedevices,ideasandnews
DanielAnderson,afamouspsychologist,believesit’simportanttodistinguishtelevision’sinfluencesonchildrenfromthose
In1947agroupoffamouspeoplefromtheartworldheadedbyanAustralianconductordecidedtoholdaninternationalfestival
Inthelastfewyearsthousandsoffilms______allovertheworld.
Agreatdealofattentionisbeingpaidtodaytotheso-calleddigitaldivide—thedivisionoftheworldintotheinfo(informati
ThevisitingprofessorisfromTheUniversityofTokyoandhespeaksEnglishwithastrongJapanese______.
Itisdifficulttoimaginewhatlifewouldbelikewithoutmemory.Themeaningsofthousandsofeverydayperceptions,thebases
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Laterheusedsharpbonesorhorns,metalknivesandmo
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Laterheusedsharpbonesorhorns,metalknivesandmo
随机试题
背景某工业建筑,建筑面积39000m2。群体工程,其中1号、2号主厂房分别为10000m2,单层钢结构;3号为科研楼,建筑面积9000m2,地上8层,地下2层,裙房3层,现浇钢筋混凝土框架—剪力墙结构,主梁跨度8.1m,外疏散楼梯宽度1.5m,外形复杂且
按照如下需求,在PowerPoint中完成产品宣传文稿的制作工作:将考试文件夹中的声音文件“BackMusic.mid”作为该演示文稿的背景音乐,并要求在幻灯片放映时即开始播放,至演示结束后停止。
关于双胍类药物治疗糖尿病下列哪项是正确的
男,54岁。为成人牙周炎患者,牙周基础治疗后6周复查时,多数牙牙颈部有菌斑,但无牙石,牙龈边缘仍有轻度充血、水肿。影响其疗效的主要因素是()
买卖合同中一般均应规定运输标志、指示性标志和警告性标志。()
在一个用L9(34)的正交试验中,各列的偏差平方和如表2.3-6所示,给定F0.90(2,2)=9.0、F0.95(2,2)=19.0,下列与本数据结果有关的正确项有()。
下列各句中没有语病的一句是()。
下列反常积分中收敛的是
ComputerMouseThebasiccomputermouseisanamazinglycleverinventionwitharelativelysimpledesignthatallowsustop
Theforeignlanguagesschoolhasalargecollectionofbooks,______areinEnglish.
最新回复
(
0
)