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
In this section, you will hear a short passage. For questions 21—30, complete the notes using no more than three words for each
In this section, you will hear a short passage. For questions 21—30, complete the notes using no more than three words for each
admin
2019-01-08
35
问题
In this section, you will hear a short passage. For questions 21—30, complete the notes using no more than three words for each blank. The passage will be read only once. Remember to write the answers on the answer sheet.
-The ocean is still salty.
-Evaporated water leaves【D1】______behind, which makes the ocean salty.
-How did oceans form?
- It is said that oceans formed at least【D2】______ago.
- Atmosphere and clouds on the Earth are gasses, such as【D3】______ escaping from the planet’s interior.
-Were oceans in the past as salty as they are today?
-Oceans were not so salty in【D4】______state.
-With【D5】______ sweeping over the planet’s【D6】______and filtering down to the hollows , materials containing ingredients of salt were picked up.
- Chlorine, came from the【D7】______and gaseous fallout of land and【D8】______volcanoes.
-The oceans’ salt content increases because of the steady flow of【D9】______and streams and the【D10】______of volcanoes and undersea vents.
【D4】
I know why the ocean is still salty: evaporated water leaves the salt behind. But how did it get salty in the first place?
According to one hypothesis, oceans formed at least 500 million year ago when water vapor and other gasses escaped from the Earth’s interior gradually formed the atmosphere and clouds surrounding the planet. As the earth cooled below the boiling point of water, rain began to fall, and kept falling for centuries. Eventually the rainfall filled the Earth’s hollows and formed oceans.
In their infant state these oceans were not nearly as salty as they are today. As the initial rains swept over the planet’s surface and filtered down to the hollows, the rushing waters picked up chemicals from erosion of the Earth’s crust. These chemicals included sodium, which is one of the main ingredients of salt. The other main ingredient, chlorine, came from the solid and gaseous fallout of land and ocean floor volcanoes. Over hundreds of millions of years, the steady flow of chemical-rich rivers and streams and the eruption of volcanoes and the undersea vents combined to increase the ocean’s salt content.
This does not mean, however, that the oceans’ saltiness is constantly increasing. Scientists believe that ocean salinity reached plateau hundreds of millions of years ago, when roughly the same amount of salt fed into the oceans was deposited as sediment on the ocean floor.
选项
答案
their infant
解析
(录音中给出信息,海水在初期形成的时候并非像现在这般咸(In their infant state these oceans were not nearly as salty as they are today),因此应填写their infant。)
转载请注明原文地址:https://kaotiyun.com/show/tZyK777K
本试题收录于:
A类竞赛(研究生)题库大学生英语竞赛(NECCS)分类
0
A类竞赛(研究生)
大学生英语竞赛(NECCS)
相关试题推荐
DevelopingEnvironmentalManagementStrategiesStrongandsustainableeconomicactivitydependsonhealthyenvironmentalman
HighDropoutRateinUSManyyoungpeopleintheUnitedStatesneverfinishhighschool.Exactlyhowmanydropoutsisanothe
ClassesinStudioeveryafternoonRoom51on【21】OnFridayscanuse【22】forprivatestudyExtracourses:Monda
______issometimescalled"theworld’sbiggestfarm".
BecauseAtlascoursesstarteveryMondayoftheyear,there’sboundtobeonethatfitsinwithyouracademic,personalorprofe
TheAustralianfederationhasa______systemofgovernment.
In,thissection,thereisonepassagefollowedbyasummary.Readthepassagecarefullyandcompletethesummarybelowbychoos
______isalsocalledthesunshinestateinAustralia.
A、Beefcurry.B、Lambcurry.C、Chickencurry.D、Coconutmilkcurry.C对话中男士询问女士Didyouknowthatchickencurrycomeswithrice?,也就
A、Thirty-sixdollars.B、Thirty-sixpounds.C、Twenty-sixdollars.D、Twenty-sixpounds.A女士说自己支票账单核算不对,男士回答忘记告诉她自己买了一双鞋。女士问鞋价多少,男士
随机试题
阅读小说片段,回答问题:赵七爷是邻村茂源酒店的主人,又是这三十里方圆以内的唯一的出色人物兼学问家;因为有学问,所以又有些遗老的臭味。他有十多本金圣叹批评的《三国志》,时常坐着一个字一个字的读;他不但能说出五虎将姓名,甚而至于还知道黄忠表字汉升和马
粒细胞缺乏症描述正确的是
气血亏虚头痛的症状特点是肝阳头痛的症状特点是
A.茵陈B.萆薢C.虎杖D.地肤子E.金钱草具有利湿退黄,解毒消肿功效的药物是
融资租赁合同的法律效力不是买卖合同和租赁合同效力的简单叠加,其法律特征有()。
下列各项中,不影响审计证据可靠性的是()。
在选择局域网的拓扑结构中,应考虑的主要因素不包括()
近年来浙江省商品交易市场呈现稳步发展态势。2009年,浙江省共有亿元以上商品交易市场670家,比上年增加31家,营业面积2298万平方米,出租摊位39万个,实现成交额9647亿元,比上年增长7.8%。从市场成交额看,成交额达10亿元以上的商品
A、白的B、蓝的C、紫的D、黑的A对话中男的说“那就听你的吧”,意思是同意对方的建议,买白色的,所以选A。
BarryhadanadvantageoverhismothersincethathecouldspeakFrench.
最新回复
(
0
)