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 sl
If the salinity(含盐量)of ocean waters is analyzed, it is found to vary only sl
游客
2023-07-22
57
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 carded 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
综合3种情况,造成海洋含盐量低的原因有:日晒少、降雨多、远离热带和海冰融化,由此可推断选项 C(降雨多)最符合。
转载请注明原文地址:https://tihaiku.com/zcyy/2858883.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
Simon:Linda,doyouknowwhenthevisitorsfromIndiaarecoming?Linda:Weoff
Thatyoucannotfeelthemovementofearthdoesnotmeanthattheearthisreall
以下哪个是肾活检的相对禁忌证病例A.活动性肾盂肾炎 B.小肾 C.原因不明的
中国海关规定,旅游者不得携带超过3000元人民币的中药材、中成药出境。( )
关于久期,下列说法正确的有()。 Ⅰ.久期可以用来对商业银行资产负债的利率敏感
电子式电压互感器合并单元输出数值异常,输出数值异常,应定性为()缺陷。(A)一般
如图所示,一皮球从粗糙的曲线形坡面的a点开始无初速度地向下滚动,由于摩擦力作用,
各种财务处理程序的特点主要表现在登记()的依据和方法不同A.明细账
初次发行H股时须进行国际路演。()
根据《公司法》的规定,一般的国有独资公司的下列事项中,必须由国有资产监督管理机构
最新回复
(
0
)