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
职业资格
When we analyze the salt salinity(盐浓度)of ocean waters, we find that it varies only slightly from place to place. Nevertheless, s
When we analyze the salt salinity(盐浓度)of ocean waters, we find that it varies only slightly from place to place. Nevertheless, s
admin
2015-06-17
22
问题
When we analyze the salt salinity(盐浓度)of ocean waters, we find that it varies only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation. In this manner, the salinity is increased, since the salt stays behind. If this is carried to the extreme, of course, white salt would be left behind; this, by the way, is how much of the table salt we use is actually obtained.
The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation.
Normally, in hot regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.
A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.
In the Weddell Sea, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portion of the oceans of the world.
The purpose of mentioning the Weddell Sea is______.
选项
A、to give an example of cold-water salinity
B、to point out the location of deep waters
C、to make a comparison between hot-water salinity and cold-water salinity
D、to show that the water in the Weddell Sea varies in salinity from place to place
答案
A
解析
根据“In the Weddell Sea,the densest water in the ocean is formed as a result of this freezing process.which increases the salinity of cold water,”可知,威尔德海是作为例子说明冰冻过程引起的盐度变化,答案为A。
转载请注明原文地址:https://kaotiyun.com/show/AlCv777K
本试题收录于:
英语学科知识与教学能力题库教师资格分类
0
英语学科知识与教学能力
教师资格
相关试题推荐
Thesenserelationofthefollowingpairofsentences(seeXandY)is______.X.MaryhasbeentoJapan.Y.MaryhasbeentoAsia
Teachersbelievinginthe______modelinageneralsenseusuallyfollowthesequenceofteachingnewwords,sentencesandthent
Ifateacherstartswithlanguageexamplesandguidesstudentstoworkouttherules,he/sheisusingthe______method.
Toassesshowwellstudentsareabletoapplywhattheyhavelearnedincompletingagiventask,ateacherwoulduse______assess
Exceptionalchildrenaredifferentinsomesignificantwaysfromothersofthesameage,forthesameage,forthesechildrento
Thetestthatattemptstomeasurestudents’naturalabilitiestolearnaforeignlanguageiscalled______.
TheBritishMedicalJournalrecentlyfeaturedastrongresponsetowhatwasjudgedaninappropriatelylenientreactionbyamedi
Whenyoufocuson"utterancefunction"and"expectedresponse"byusingexampleslike"apology/acceptance,inform/acknowledg
Potentialsubjectsshouldbeinformedoftheresearchand______anopportunitytodecideiftheywanttoparticipate.
Thecommoncoldistheworld’smostwidespreadillness,whichisplaguethatfleshreceives.Themostwidespreadfallacyofa
随机试题
简述皮质脊髓侧束的走行。
设二维随机变量(X,Y)的密度函数为则X与Y【】
下列不属于第二信使的特点的是()
带相同电荷的药物间发生反应,溶剂介电常数减少时,反应速度常数k值
陆某为制衣厂经营人,自2013年年初,陆某因资金不足,开始拖欠该厂职工工资,至2013年年末共拖欠韩某等17名工人工资共计人民币15万余元。该地劳动争议仲裁委员会先后两次作出仲裁协议,裁决陆某支付拖欠的工资。该仲裁协议生效后,陆某转移财产,逃避支付报酬。对
()中央确立实施“走出去”战略,坚持“引进来”和“走出去”同时并举,相互促进的方针。
按()标准可以将社区划分为农村社区和城市社区。
执法人员当场作出行政处罚决定的,应当向当事人出示执法身份证件,填写预定格式、编有号码的行政处罚决定书。行政处罚决定书应当当场交付当事人。()
请用不超过200字的篇幅,概括出给定资料所反映的主要问题。要求:概括全面,层次分明,条理清楚,表述简洁。请就如何解决给定资料所反映的主要问题提一些建议措施。要求:体现针对性和和可操作性,思路清晰、条理清楚,不超过300字。
下列与Access表相关的叙述中,错误的是
最新回复
(
0
)