单项选择题

The fundamental ______ . which govern all physical processes are also related to many everyday occurrences.

A．rules
B．regulations
C．principals
D．principles
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单项选择题
I don't think it's wise of you to ______ your greater knowledge in front of the director, for it may offend him.
A．show up
B．show out
C．show in
D．show off
单项选择题
Physically we feel comfortable. But ______ ,we suffer a lot.
A．psychologically
B．moderately
C．naturally
D．precisely
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