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  3. What does the passage mainly discuss? Which of the following statements about the salinity of a body of water can best be infer

What does the passage mainly discuss? Which of the following statements about the salinity of a body of water can best be infer

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问题 What does the passage mainly discuss?
Which of the following statements about the salinity of a body of water can best be inferred from the passage?
选项 A、The temperature of the water is the most important factor.
B、How quickly the water moves is directly related to the amount of salt.
C、Ocean salinity has little effect on sea life.
D、Various factors combine to cause variations in the salt content of water.
答案D
解析 文章中谈了四种使海水含盐量发生变化的因素。我们可以推断：任何海面不可能只受其中一种因素的影响，海水盐浓度的变化必定是受多种因素共同影响的结果，故D项为A、B、C项所属内容无法从中推出。
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