首页
登录
职称英语
Tides are created mainly by the pull of the moon on the earth. The moon’s pu
Tides are created mainly by the pull of the moon on the earth. The moon’s pu
游客
2025-04-13
27
管理
问题
Tides are created mainly by the pull of the moon on the earth. The moon’s pull causes water in the o-ceans 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. [br] If the pull of the sun equaled the pull of the moon,tides would_____.
选项
A、sometimes be higher than they are now
B、be the same height they are now
C、no longer be affected by the wind
D、be of equal height all the time
答案
A
解析
题目问:如果太阳的引力与月球的引力相当,则潮汐将会怎样?文章第八句“When the sun and the moonare pulling along the same line,the tides rise higher,and when they pull at right angles to one another,thetide is lower.”通过这段话可知,当太阳和月亮的拉力在同—条线上时,潮汐会增高。据此判断,应选择A。
转载请注明原文地址:http://tihaiku.com/zcyy/4035380.html
相关试题推荐
Televisionisoneofthemeans(A)bywhichthesefeelingsarecreatedandconveye
Inthepast,Americancollegesanduniversitieswerecreatedtoserveadual
Inthepast,Americancollegesanduniversitieswerecreatedtoserveadual
Inthepast,Americancollegesanduniversitieswerecreatedtoserveadual
Inthepassage,theauthorismainlyconcernedwith______.A、analyzingaproblem
Tidesarecreatedmainlybythepullofthemoonontheearth.Themoon’spu
TheChisosMountainsinBigBendNationalParkinTexaswerecreatedbyvolcanic
Thisisthe______pianoonwhichthecomposercreatedsomeofhisgreatestworks.
Thisisthe______pianoonwhichthecomposercreatedsomeofhisgreatestworks.
Lately,therestaurantchain,which______mainlytoblue-collardiners,hasbeen
随机试题
Ourplane______offfromNewYorkat6:00yesterdayevening.A、tookB、putC、flewD
ReadingforpleasureistheeasiestwaytobecomeabetterreaderinEnglish
单克隆抗体属于治疗用生物制品注册分类中A.第4类 B.第5类 C.第3类
二尖瓣关闭不全(MI)时,M型、B型、多瞢勒三种检测中,哪种最敏感?
下列属感染性发热的是A.无菌性坏死组织吸收 B.变态反应 C.内分泌代谢疾病
在水中浸泡以减轻刺激性的黑膏药制备过程为A.摊涂 B.药材提取 C.炼
智能变电站一体化监控系统事件顺序记录分辨率(SOE):间隔层测控装置≤(
中国是世界上稀土资源最丰富的国家,素有“稀土王国”之称。下列关于稀土的表述,错误
人们有一种从好的方面来归因自己行为的趋势,这是()。单选A.自我服务倾向
规划设计220kV同塔双回路悬垂直线塔时,假定悬垂I串长度为3.0m,要求最大档
最新回复
(
0
)