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
If the salinity (含盐量) of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of
If the salinity (含盐量) of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of
admin
2017-11-17
127
问题
If the salinity (含盐量) of ocean waters is analyzed, it is found to vary 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—conversion of liquid water to water vapor. In this manner, the salinity is increased, since the salts stay behind. If this is carried to the extreme, of course, white crystals of salt would be left behind.
The opposite of evaporation is precipitation (降水), such as rain, by which water is added to the ocean. Here the ocean is being diluted(稀释) 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 or runoff (形成地表水部分的降雨).
Normally, in tropical 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, off Antarctica, the densest water in the oceans 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 portions of the oceans of the world.
Which of the following processes will increase salinity of ocean waters?
选项
A、Evaporation.
B、Precipitation.
C、Melting.
D、Dilution.
答案
A
解析
事实细节题。只要明白第1段第5句中的in this manner是指第4句中的evaporation,不难做出正确选择。选项B、C会使含盐量减少,很容易排除。具体的反证分别出现在第2段首句、第3段尾句和第4段首句。
转载请注明原文地址:https://kaotiyun.com/show/ALa7777K
0
大学英语四级
相关试题推荐
Todaywetalkaboutthedifferencebetweenacollegeandauniversity.Collegesanduniversitieshavealotincommon.Theyprep
PeopleintheUScannowcarryanartificialintelligence(AI)aroundintheirpocket,whereitwaitspatientlytobetoldwhatto
Imagineyouwenttoarestaurantwithadate;hadaburger,paidwithacreditcard,andleft.Thenexttimeyougothere,thew
Imagineyouwenttoarestaurantwithadate;hadaburger,paidwithacreditcard,andleft.Thenexttimeyougothere,thew
Anewstudysuggeststhatthemoreteenagerswatchtelevision,themorelikelytheyaretodevelopdepressionasyoungadults.B
Anewstudysuggeststhatthemoreteenagerswatchtelevision,themorelikelytheyaretodevelopdepressionasyoungadults.B
TheUSCongressA)TheUScongressisthelegislativebranchofthefederalgovernment.Itisabicameral(两院制的)law-making
Cryingishardlyanactivityencouragedbysociety.Tears,betheyofsorrow,anger,orjoy,typicallymakeAmericansfeeluncom
Cryingishardlyanactivityencouragedbysociety.Tears,betheyofsorrow,anger,orjoy,typicallymakeAmericansfeeluncom
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonlyslightlyfromplacetoplace.Nevertheless,someof
随机试题
下列输血适应证中哪一项是错误的
关于视紫红质叙述中,错误的是
移植患者接受了同种异体的血液后可以产生不同的免疫反应。包括免疫排斥、免疫耐受和免疫抑制,所产生的免疫反应类型可能与移植物的类别、疾病的种类以及免疫系统的状态关系密切,具体机制不明。输注献血者血液可以提高肾脏移植的存活率的原因是
简述债务承担的条件与效力。
施工组织总设计、单位工程施工组织设计和分部(分项)工程施工组织设计的区别有()。
简述备学生包括的内容。
设计概念结构时,通常使用的方法有()。
谈谈你对民主集中制是党的根本组织制度和领导制度的理解。
在工作和生活中如果不了解基本的科学常识,往往会引发严重的后果。遇到下列情况,正确的做法是______。
Thereare(11)intheU.S.:Ifyouhaveto(12)severaltimezonesin12hoursorless,youmayfeelanupsetofyour
最新回复
(
0
)