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2011职称英语考前每日一练[卫生类B级-第18期]

2010-12-23 09:25 来源:正保会计网校 打印 | 收藏 |
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  第2部分:阅读判断(第1~7题,每题1分,共7分)

  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 per cent 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.

  16 We have not fully understood how salt got into the ocean.

  A Right B Wrong C Not mentioned

  17 The author is sure that the dissolved salt from the earth's surface is the only source of the huge quantity of salt found in oceans.

  A Right B Wrong C Not mentioned

  18 If all the oceans were dried up, the salt thus obtained would be extremely great in size.

  A Right B Wrong C Not mentioned

  19 The percentage of salt content in the Red Sea is higher than that in the Dead Sea.

  A Right B Wrong C Not mentioned

  20 Beds of rock salt are found in every part of the world.

  A Right B Wrong C Not mentioned

  21 After evaporation, about ten percent of seawater becomes rock salt.

  A Right B Wrong C Not mentioned

  22 Most commercial salt is obtained from seawater.

  A Right B Wrong C Not mentioned

  同时按下Crtl键和A键查看答案

  

1. A  2. B  3. B  4. C
5. A  6. A  7. B 

我要纠错】 责任编辑:桔梗
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学员:chuhero 感谢周涵老师,职称英语过了。我觉得应该在这里跟老师说声谢谢,老师的讲课很实用,针对性强,是很有学习价值的课程,如果你想通过职称英语考试,就听周老师的课程吧。

学员:王仁芝 我去年7月开始差不多从零学起,坚持到考试,考了72分,十分感谢老师及网校的辅导!

学员:lilizhangx 职称英语通过了!毕业10年了,没怎么接触英语,跟着周涵老师学习,一次通过!

学员:张洪杰 首先感谢周涵老师,好多年没有学习了,经过老师的讲解顺利过关,这已经出乎我的预料,真的很激动,终于没让老师们失望,通过了,很高兴。

学员:xsqxxlxzj 十多年没有学习过英语了,通过职业培训教育网3个多月的学习,83分通过职称英语综合C级考试,非常感谢周涵老师,谢谢您!

学员:best888zhou 毕业以后就没有翻过英语了,丢了有七年了,虽然以前基础还不错,但这次真的是没有信心,过年后开始复习,用了差不多一个月的时间,B级综合考了80分,很开心,谢谢周涵老师的细致讲解!

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