首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
下面的短文后列出了 7 个句子,请根据短文的内容对每个句子做出判断:如果该句提供的是正确信息,请选择A ; 如果该句提供的是错误信息,请选择B ; 如果该...
下面的短文后列出了 7 个句子,请根据短文的内容对每个句子做出判断:如果该句提供的是正确信息,请选择A ; 如果该句提供的是错误信息,请选择B ; 如果该...
admin
2020-12-24
54
问题
下面的短文后列出了 7 个句子,请根据短文的内容对每个句子做出判断:如果该句提供的是正确信息,请选择A ; 如果该句提供的是错误信息,请选择B ; 如果该句的信息文中没有提及,请选择C。
Where Has the Salt Come from?
Every now and then, we meet a fact about our earth that makes us feel strange and no answer for the fact has yet been found. Such a fact is the existence of salt in the oceans. How did it get there?
We simply do not know how the salt got into the ocean! We do know, of course, that salt is water-soluble, and so passes into the oceans with rainwater. The salt of the earth’s surface is constantly being dissolved (溶解) and is passing into the ocean.
But we do not know whether this can explain the huge quantity of salt in oceans. If all the oceans were dried up, enough salt would be left to build a wall 180 miles high and a mile thick. Such a wall would reach once around the world at the Equator (赤道)!
The common salt that we all use is produced from seawater or the water of salt lakes, from salt springs ( 源泉) and from deposits of rock salt. The concentration (浓度) of salt in seawater ranges from about three percent to three-and-one-half percent. The Dead Sea,
which covers an area of about 340 square miles, contains about 11, 600, 000, 000 tons of salt!
On the average, a gallon (加仑) of seawater contains about a quarter of a pound of salt. The beds of rock salt that are found in various parts of the world were all originally formed by the evaporation (蒸发) of seawater millions of years ago. It is believed that the
thick rock-salt deposits were formed after about nine-tenth of the volume of seawater had been evaporated.
Most commercial salt is obtained from rock salt. The usual method is to drill wells (井) down to the salt beds. Pure water is pumped down (抽进去) through a pipe. The water dissolves the salt and it is forced through another pipe up to the surface.
If all the oceans were dried up, the salt thus obtained would be extremely great in size.
选项
A Right B Wrong C Not mentioned
答案
A
解析
转载请注明原文地址:https://ti.zuoweng.com/ti/4JlQKKKQ
相关试题推荐
下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。 YoungAdultsWhoExerciseGetHigher...
下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。 YoungAdultsWhoExerciseGetHigher...
下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。 YoungAdultsWhoExerciseGetHigher...
下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。 YoungAdultsWhoExerciseGetHigher...
下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。 YoungAdultsWhoExerciseGetHigher...
下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。 YoungAdultsWhoExerciseGetHigher...
下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。 YoungAdultsWhoExerciseGetHigher...
下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。 YoungAdultsWhoExerciseGetHigher...
下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。 YoungAdultsWhoExerciseGetHigher...
下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。 Mt.DesertIs...
随机试题
化妆品中过量的重金属主要源于 A.为防腐而添加 B.生产过程和原材料 C.
一预应力后张法采用JM型锚具的24m钢筋混凝土屋架下弦,其一根预应力钢筋的长度为
近几年,为治理城镇污水,污水处理厂的建设不断升温。大规模上马污水处理厂,的确能在
婴儿腹泻经第1天补液后脱水症状改善,第2天后的处理应为
个人理财业务活动中法律关系的主体有两个,即()。 A.中央银行和商业银行B
容易早期发生肺部转移的口腔颌面部肿瘤是()A.舌癌B.颊癌C.黏液表皮样癌D.牙龈癌E.腺样囊性癌
调查显示,59.4%的公众感觉当前社会“逆淘汰”现象普遍.其中18.8%的人觉得“非常多”。所谓“逆淘汰”,简言之,即指坏的淘汰好的,劣质的淘汰优质的,平...
某种药物要发挥其特有的药理作用,必须A.达到高的血浓度B.从胃肠道吸收C.在作用部位达到足够的浓度D.以原型在尿中排泄E.设计成起效最快且作用时间长的剂
某税务机关核定个体户张某应纳税额为4500元,张某推托有事,一直未缴纳税款。经该税务机关责令缴纳,张某仍拒不缴纳,税务机关依法扣押了其相当于4500元税款...
如果一项作业是增值作业,应同时满足的标准有()。A.该作业能够使产品价值增值B.该作业导致了状态的改变C.该状态的变化不能由其他作业来完成D.该作业