39（）The main idea of the reading is that _______.
(A) there are people who like different foods.
(B) there are cultural and genetic reasons for the differences in people’s food preferences
(C) some foods have a very strong flavor.
(D) PROPs can be used to identify different types of tastes.

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統計： A(20), B(385), C(16), D(189), E(0) #2275426

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閱讀理解您如何對咖啡或檸檬等不同食物的...
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Your culture and your life experience are partly responsible for your preference for certain foods. Your food preferences are also partly genetic. (Your genetic preferences are the ones that you were born with.) 

In order to discover people’s genetic preferences, researchers use a chemical called PROP. 

後面都在介紹PROP，故選Ｂ

(B) there are cultural and genetic reasons for the differences in people’s food preferences 

 

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