单项选择题

Essentially, a theory is an abstract, symbolic representation of ______ reality.

A．what it is conceived
B．that is conceived
C．what is conceived to be
D．that is being conceived of
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单项选择题
People s expectations for a higher standard of living increase ______.
A．conditions in their community
B．since conditions in their improving
C．conditions in their community improve
D．as conditions in their community improve
单项选择题
Uniform acceleration occurs ______ the rate of change remains the same over successive and equal intervals of time.
A．according
B．if
C．with
D．under
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