单项选择题

A．The woman is a better mechanic than he is.
B．He might help the woman much.
C．He doesn’t know a lot about newer cars.
D．The woman shouldn’t buy a used car.
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单项选择题
This procedure does not allow for adaptability, essential for applications such as process control, which must change as conditions______________.
A．fluctuate
B．stagger
C．swing
D．vibrate
单项选择题
To prevent the spread of the epidemic, the public health organization carries out frequent ____________on the restaurants.
A．inspection
B．investigation
C．observation
D．examination
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