单项选择题

A．To see how certain chemicals produce different flavors.
B．To determine if a person can distinguish salty and sweet solutions.
C．To map the location of taste buds.
D．To count the number of taste buds.
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In the author’’ s eye, swimming may help you to feel much more alive.
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One reason why the author recommends to make morning time your activity time may be the fact that we are more energetic in the morning.
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