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
2024-02-17
3
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] According to this passage, the sea______is likely to have the lowest salinity.
选项
A、in tropical areas
B、off Antarctica
C、of high rainfall
D、with abundant sunshine
答案
C
解析
推理判断题。综合3种情况,造成海洋含盐量低的原因有:降雨多、日晒少、远离热带和海冰融化,由此可推断选项C最符合。A和D是使海水含盐量增加的,因此可排除。B是否一定海水含盐低,文中并未提到。
转载请注明原文地址:https://tihaiku.com/zcyy/3459707.html
相关试题推荐
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)ofoceanwaterisanalyzed,itisfoundtovaryonlysl
随机试题
[originaltext]M:Honey,thesecondhalfofthebasketballgameisabouttostar
Whensomebodycalls,firstofall,the【B1】______wouldofferhimacigarette
质量管理的八大原则不包括()。A.以顾客为重点,领导作用 B.全员参与,过程
当受拉钢筋的直径d>22mm及受压钢筋的直径d>25mm时,不宜采用绑扎搭接接头
“水火既济”反映何脏关系A.心与脾 B.肝与脾 C.心与肾 D.肝与肾
下面不属于项目经理所需要的知识的是()。A:丰富的IT知识 B:良好的协调和
关于计算新增固定资产的表述,正确的是( )。 A、为了保护环境而正在建设的附
期货公司的交易保证金不足,期货交易所未按规定通知期货公司追加保证金的,由于行情向
下列地基中,适合深层搅拌法处理的有()。A.淤泥质土地基 B.粉土地基 C
某企业与张某签订劳动合同。张某工作后,单位发现其严重近视,因该工种对视力有严格要
最新回复
(
0
)