首页
登录
职称英语
If the salinity (含盐量) of ocean waters is analyzed, it is found to vary only
If the salinity (含盐量) of ocean waters is analyzed, it is found to vary only
游客
2024-02-03
4
管理
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. [br] Coastal regions are mentioned as cases where _____.
选项
A、sea water is less salty because fresh water joins in
B、rivers carry industrial exhaust into sea
C、sea ice tends to melt more quickly than in the center of oceans
D、heavy water sinks to the deeper portions of the oceans
答案
A
解析
推理判断题。coastal regions字眼在文章中提到两遍,分别在第2段第3句及第3段最后一句。只要能够迅速查找到任何一处均可做出正确判断为A。B和C无原文支持;D张冠李戴,原文提及D内容涉及的是Weddell Sea,而非coastal regions。
转载请注明原文地址:https://tihaiku.com/zcyy/3417571.html
相关试题推荐
[originaltext]Venice,asmall,watersidecityinnortheastItaly,boilswit
[originaltext]Venice,asmall,watersidecityinnortheastItaly,boilswit
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonly
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonly
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonly
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonly
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonly
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonly
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonly
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonly
随机试题
NowwetraveltothenorthcentralpartoftheUnitedStates.Weareinthe
6箱新鲜橘子由北京空运往东京,毛重共274.8kg,体积尺寸为128cm×42c
小蓟饮子的药物组成中不包括A.藕节、木通B.当归、蒲黄C.大黄、车前子D.生地黄
工作票中如有个别错、漏字需要修改,应使用规范的(),字迹应清楚。A.符号
手机电池经历了镍镉电池、镍氢电池和锂离子电池3个阶段。锂离子电池相对于其它两种电
A.5个 B.6个 C7个 D.8个
现代企业不仅是物质生产者,也是文化观念的创造者;企业既生产自身,也创造人格;既创
房地产市场营销因素调查包括的类型有()。A、竞争情况调查 B、价格调查
A.塞来昔布 B.对乙酰氨基酚 C.布洛芬 D.吲哚美辛 E.吡罗昔康导
关于晋升竞赛的说法,正确的有( )。A.晋升竞赛获胜者与失败者会共享奖金,只不
最新回复
(
0
)