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
Tides are created mainly by the pull of the moon on the earth. The moon’s pull causes water in the oceans to be a little deeper
Tides are created mainly by the pull of the moon on the earth. The moon’s pull causes water in the oceans to be a little deeper
admin
2012-05-18
95
问题
Tides are created mainly by the pull of the moon on the earth. The moon’s pull causes water in the oceans to be a little deeper at a point closest to the moon and also at a point farthest from the moon,on the opposite side of the earth. These two tidal "waves"follow the apparent movement of the moon around the earth and strike nearly every coast line at intervals of about twelve hours and twenty-five minutes. After reaching a high point,the water level goes down gradually for a little more than six hours and then begins to rise towards a new high point. Hence,most coast lines have two tides a day,and the tides occur fifty minutes later each day. Differences in the coast line and in channels in the ocean bottom may change the time that the tidal wave reaches different points along the same coast line. The difference in water level between high and low tide varies from day to day according to the relative positions of the sun and the moon because the sun also exerts a pull on the earth,although it is only about half as strong as the pull of the moon. When the sun and the moon are pulling along the same line,the tides rise higher,and when they pull at right angles to one another,the tide is lower. The formation of the coast line and variations in the weather are additional factors which can affect the height of tides. Some sections of the coast are shaped in such a way as to cause much higher tides than in other areas. A strong wind blowing towards the shore may also cause tides to be higher.
Which of the following is an accurate statement about the pull of the sun on the earth?
选项
A、It determines the time of high tide.
B、It is about twice the pull of the moon.
C、It determines the time of low tide.
D、It is about half the pull of the moon.
答案
D
解析
题目问:下列哪项准确地描述了太阳对地球的引力?第七句“The difference in water level betweenhigh and low tide varies frOm day to day according to the relative positions of the sun and the moon because the sun also exerts a pull on the earth,although it is only about half as strong as the pull of themoon.”通过这段话可知,太阳对地球的拉力只相当于月球对地球引力的一半。据此判断。应选择D。
转载请注明原文地址:https://kaotiyun.com/show/QXnO777K
0
考博英语
相关试题推荐
Helookeda(littlebit)nervous,(that)couldbeseenfromhis(facialexpression).
Directions:Writeacompositionofabout180wordsonthefollowingtopic.YourcompositionshouldbewrittenonAnswerSheetⅡ.
You’vebeentalkingwithDavidalleveningwhenyououghttobe______withotherguests.
Furthermore,thecampaignitselfwaslavishlyfinanced,withplentyofmoneyfortop-flightstaff,travel,andtelevisioncommer
Parentshavetoshowdueconcernstotheirchildren’screativityandemotionalout-put;otherwisewhattheythinkbeneficialto
Tidesarecreatedmainlybythepullofthemoonontheearth.Themoon’spullcauseswaterintheoceanstobealittledeeper
ThebuffalowhichthelionfellsprovokeshisaggressionaslittleastheappetizingturkeywhichIhavejustseenhanginginth
Europeasa______unitdidlittlebyitself;iteithersentforUShelp,oreachEuropeangovernmentactedonitsown.
Theoppositeofadaptivedivergenceisaninterestingandfairlycommonexpressionofevolution.Whereasrelatedgroupsoforgan
Humanfacialexpressionsdifferfromthoseofanimalsinthedegreetowhichtheycanbe______controlledandmodified,
随机试题
硫对焊缝金属的危害有哪些?
下列不是供应链管理的基本管理思想的是()
患者,男,41岁。因车祸伤致颅内血肿,深昏迷,脑疝形成。实施颅内血肿清除,去骨瓣减压手术,术中输血3600ml,术后转入ICU,患者出现皮肤紫斑,切口部位有出血。应首先考虑的诊断是
既能疏肝破气,又能散结消滞的药物是()
甲国某民航飞机在乙国领空飞行时被乙国公民加西亚等四人劫持,后乙国将加西亚等四人控制,甲国提出引渡请求,但被乙国拒绝,甲、乙两国均为三个国际民航安全公约的缔约国,但两国之间并无引渡条约。依相关国际法规则,下列哪些说法是正确的?()
项目监理机构的工作效率在很大程度上取决于人际关系的协调,总监理工程师在进行项目监理机构内部人际关系的协调时,可从( )等方面进行。
上市公司发生的下列交易或事项中,会引起上市公司股东权益总额发生增减变动的有()。
下列企业适用“三证合一、一照一码”登记制度的有()。
根据技能的性质和表现形式,通常把技能分为动作技能和()。
如图所示,D、E分别为三角形边AB、AC的中点和三等分点,那么三角形ADE与四边形BCDE的面积之比为:
最新回复
(
0
)