单项选择题

Some insects rely on the tiny hairs scattered over their bodies to sense sound waves.

A．detect
B．amplify
C．send
D．disguise
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单项选择题
The sensation of a lump in one's throat arises from an increased flow of blood into the tissues of the pharynx and larynx.
A．explanation
B．disease
C．feeling
D．unpleasantness
单项选择题
Cameras take the sharpest pictures when they are held still.
A．clearest
B．fastest
C．most interesting
D．most beautiful
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