单项选择题

What is the passage mainly about

A．How the precipitation or runoff is actually formed.
B．How the table salt we use is obtained.
C．The processes that cause a change in oceanic salinity.
D．The processes the dissolved materials are left behin

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单项选择题

The old copy of the software______.

A．is internet based
B．is telephone based
C．is well accepted
D．is well programmed

单项选择题

Which of the following is Not True about the upgraded software

A．It is sold with handled PalmPilot computers.
B．It has not enjoyed popularity in high school.
C．It is objected by many students.
D．It can work on a school's network central server.