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
自考
The Salinity of Ocean Water If the salinity of ocean water is analyzed, it is found to vary only slightly from place to plac
The Salinity of Ocean Water If the salinity of ocean water is analyzed, it is found to vary only slightly from place to plac
admin
2013-09-17
34
问题
The Salinity of Ocean Water
If the salinity of ocean water 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, 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 or runoff.
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 that in other oceanic areas.
A third process by which salinity may be altered is associated with the formation and melting of sea ice. When sea water is frozen, the dissolved materials are left behind. In this manner, sea water 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 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.
All of the following are processes that decrease salinity EXCEPT______.
选项
A、evaporation
B、precipitation
C、runoff
D、melting
答案
A
解析
事实细节题。根据第三段“…decreased by the addition of fresh water by precipitationor runoff.”及最后一段“…when this ice melts,it will tend to decrease the salinity of the surround—ing water.”可以排除B、C、D选项,因此选A。
转载请注明原文地址:https://kaotiyun.com/show/ipAR777K
本试题收录于:
英语(二)题库公共课分类
0
英语(二)
公共课
相关试题推荐
资本主义民主制的核心和主要标志是
区分量变和质变的根本标志是()
标志科学社会主义理论正式面世的著作是
Thisisan______(exception)case;I’veneverseenanythinglikeitbefore.
Parentscanhaveagreatimpactonthedevelopmentoftheirchildren’screativityinart.Butfirst,theyhavetoknowhow.They
Weallbelievethatmodemtechnologycanmakelifebetterbecauseitmakeseverythingfaster.Butby(11)______everythingup,
Inphilosophy,______(ideal)isthebeliefthatobjectsdonotexistintheworld,butonlyexistinthemindofGodorthepeopl
Christmastreesareusually______(decoration)withcoloredlights.
TheSalinityofOceanWaterIfthesalinityofoceanwaterisanalyzed,itisfoundtovaryonlyslightlyfromplacetoplac
随机试题
慢性肾功能不全患者常出现
肾小球性蛋白尿以下列何种蛋白为主
在严重创伤或感染时,最易受损的器官是
某养殖户购买40头30kg的猪,两天后出现呼吸困难,体温升高,厌食,陆续发病达20头,4天后死亡2头,5天后邻近6头80kg大猪也发病,剖检见肺充血、肿大,有淡红色渗出物,肺和胸膜粘连。病原分离培养严格依赖烟酰胺腺嘌呤二核苷酸(NAD)。目前我国免疫预
常用于厌氧菌感染创面的溶液有
有关对梁、板的构造要求中,梁的截面高度一般按跨度确定,宽度一般是高度的()。
根据《公司法》,股东的出资方式不包括()。
世称“颠张狂素”指的是唐代著名书法家张旭、怀素。()
公务用车
设有向曲面S为锥面的下侧,且介于z=1与z=4之间,f(x,y,z)为连续函数,求第二型曲面积分
最新回复
(
0
)