单项选择题

Which of the following can not be used as the title for this passage

A．Some Findings on Oceanic Salinity.
B．Salt Production and Oceanic Salinity.
C．Main Differences in Oceanic Salinity.
D．Basic Processes of Changes in Oceanic Salinity.

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单项选择题

Which of the following processes will increase salinity of ocean waters

A．Evaporation.
B．Precipitation.
C．Melting.
D．Rainfall.

单项选择题

Which of the following best concludes the main topic of this passage

A．The precipitation and evaporation of oceans.
B．The causes of the changes in salinity of ocean water.
C．Different oceans in tropical and coastal regions.
D．The formation and melting of sea ice.