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题目:

Have you ever wondered if people of all ages love sour foods, or if age correlates with this preference? There are a lot of different kinds of sour candies and drinks you may have seen advertised before, some having only a mild sour flavor and others that are truly mouth-watering!Taste is detected by the taste buds that line the tongue and other parts of the mouth.Although there is some variation from person to person, the human tongue has an average of about 10,000 taste buds.Inside each taste bud are several receptor cells,which can sense the five different tastes and send that information to the brain.In addition to taste, people think about several other factors when deciding if something is acceptable to eat。These include other components of flavor, such as how spicy a food is or how it smells,and whether the food is something they like eating for cultural or personal reasons.

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