单项选择题

It can be concluded from the passage that the author's attitude toward "sex selection" is________.

A．negative
B．positive
C．neutral
D．favorable
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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.
单项选择题
Which of the following processes will increase salinity of ocean waters
A．Evaporation.
B．Precipitation.
C．Melting.
D．Rainfall.
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