首页
登录
职称英语
If the salinity (含盐量) ocean waters is analyzed, it is found to vary only sli
If the salinity (含盐量) ocean waters is analyzed, it is found to vary only sli
游客
2023-07-24
57
管理
问题
If the salinity (含盐量) 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. [br] The Weddell Sea _________.
选项
A、is a good example of increased salinity in freezing sea water
B、is much larger in area than the Arctic oceans
C、has a much lower salinity now than ever
D、has the denser water in its upper parts
答案
A
解析
选项A是对该句的同义改写。
转载请注明原文地址:https://tihaiku.com/zcyy/2863982.html
相关试题推荐
Ifthesalinity(含盐量)oceanwatersisanalyzed,itisfoundtovaryonlysli
Ifthesalinity(含盐量)oceanwatersisanalyzed,itisfoundtovaryonlysli
Ifthesalinity(含盐量)oceanwatersisanalyzed,itisfoundtovaryonlysli
Ifthesalinity(含盐量)oceanwatersisanalyzed,itisfoundtovaryonlysli
Ifthesalinity(含盐量)oceanwatersisanalyzed,itisfoundtovaryonlysli
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonlysl
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonlysl
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonlysl
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonlysl
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonlysl
随机试题
Mynineyearolddaughter,Maria,isinYearFour.Everyeveningwegetintohom
AboutRercyCerutty,whichofthefollowingisright?[originaltext]Amongthe
Inpolicework,youcanneverpredictthenextcrimeorproblem.Noworking
Asubjectwhichseemstohavebeeninsufficientlystudiedbydoctorsandpsy
Thatlargeregionsofthegalaxycanbeinfluencedbytheformation
Thechangeinthatvillagewasmiraculou
需立即进行剖宫产术的征象是出现()。A.生理性缩复环 B.病理性缩复环 C.
某房地产开发商于2008年5月1日以1.8亿元合法取得一宗房地产开发用地,土地面
原生动物在污水生物处理中不具备下列哪项作用?A.指示生物 B.吞噬游离细菌
某诊所没有《药品经营许可证》,只配备使用省级卫生健康部门和省级药品监督管理部门规
最新回复
(
0
)