单项选择题

Early universities did not originate as institutions, but began instead as collections of scholars.

A．rather
B．at first
C．appropriately
D．accidentally
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单项选择题
According to the science of aerodynamics,the shape of an object influences the amount of drag created by air flowing around it.
A．form
B．size
C．weight
D．interior
单项选择题
One of the newer conservation projects undertaken by the state of Oklahoma involves flood prevention.
A．topics
B．programs
C．concerns
D．schools
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