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保安考试

2016年英语四级阅读每日一练(10)

1、 This passage mainly tells us about_______.

  • A. the analysis of the salinity of ocean waters
  • B. the causes of the variation in oceanic salinity
  • C. the importance of the changes in oceanic salinity
  • D. the different forms of salts in ocean waters

2、It can be known from the passage that increase in the salinity of ocean water is caused

by______.

  • A. melting of sea ice
  • B. precipitation
  • C. evaporation
  • D. supplement of salt

3、Which of the following is not the cause of the decrease in the oceanic salinity?

  • A. Precipitation.
  • B. Rain and snow.
  • C. Formation of ice.
  • D. Addition of water by rivers.

4、Which of the following statements is TRUE according to the passage?

  • A. Oceanic salinity has great effect on sea life.
  • B. Many factors combine to cause changes in oceanic salinity.
  • C. The movement of the water is related to the amount of salt.
  • D. The temperature of the water has much to do with the oceanic salinity.

5、The purpose of mentioning the Weddell Sea is_______.

  • A. to give an example of cold-water salinity
  • B. to point out the location of deep waters
  • C. to make a comparison between hot-water salinity and cold-water salinity
  • D. to show that the water in the Weddell Sea varies in salinity from place to place