It can be known from the passage that increase in the salinity of ocean water...

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问题 It can be known from the passage that increase in the salinity of ocean water is caused by___________.
选项 A.melting of sea ice B.precipitation C.evaporation D.supplement of salt
答案 C
解析 根据第一段“One of these is the subtraction of water from the ocean by means of evapora-tion.In this manner,the salinity is increased.”可知,答案为C,即海水蒸发可使盐度增加。

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