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
2023-06-25
50
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:http://tihaiku.com/zcyy/2780482.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)ofoceanwatersisanalyzed,itisfoundtovaryonly
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonly
[originaltext]NewYorkStateplanstoshutoffthethunderingwatersofNia
[originaltext]NewYorkStateplanstoshutoffthethunderingwatersofNia
[originaltext]NewYorkStateplanstoshutoffthethunderingwatersofNia
随机试题
She(thought)thatthework(was)(too)difficultto(doit).A、thoughtB、wasC、t
在室内质控过程中,若某一天质控结果在±3s之外,则判断为A.失控 B.待决定
已知在关联参考方向下,某个元件的端电压为2V,流过该元件的电流为5mA,则该元件
鼻饲法目的
A.参苓白术散 B.完带汤 C.大补元煎 D.补中益气汤 E.圣愈汤治疗
苦杏仁的镇咳作用机制是A.抑制呼吸中枢B.抑制呼吸道感受器C.增加气管黏液-纤毛
某市政府将一宗闲置土地使用权无偿收回,提供给甲房地产开发企业(以下简称甲企业)开
初筛大肠癌的检查方法是()。A.大便隐血检查 B.X线气钡造影 C.直肠检查
教师的专业发展包括( )A.道德的发展 B.知识的发展 C.教学实践能力的
间接费包括()。A.冬雨期施工增加费 B.夜间施工增加费 C.安全生产措施
最新回复
(
0
)