单项选择题

A．In the early 17th century.
B．In the early 18th century.
C．In the late 17th century.
D．In the late 18th century.
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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.
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.
单项选择题
A．At a fitness centre.B．At a clinic.C．At a school.D．At a club.
A．At a fitness centre.
B．At a clinic.
C．At a school.
D．At a club.
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