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
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单项选择题
The word they (Line 5, Para. 4) refers to______.
A．parents
B．schools
C．activities
D．students
单项选择题
Which of the following is true
A．The ocean salinity is lower in tropical regions.
B．The ocean salinity is higher in coastal regions where rivers flow into the sea.
C．The ocean salinity is higher in dry regions.
D．The ocean salinity is lower in regions with little precipitation.
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