[填空题] Why does one person’’s mouth water at the mere mention of oysters 【B1】 someone else’’s curls in disgust Puzzling 【B2】 the many reasons has left scientists feeling at times like blind men trying to 【B3】 an elephant. We are turned 【B4】 or off by the flavor, smell, texture and appearance of some food. Here, cultural biases come into 【B5】 . We are born liking sweet tastes and disliking bitter ones. 【B6】 we learn other fondnesses and aversions. Psychologist Paul of the University of Pennsylvania assumed that we 【B7】 these things from our parents. But when he 【B8】 the first survey on food preferences within families, he was 【B9】 to find he was wrong. Parents were proved to have no 【B10】 effect on their children’’s likes and dislikes or desire to try new foods. 【B11】 he concluded that cultural background is the single most powerful influence on our tastes because it 【B12】 us to certain combinations of foods and flavors. Americans are familiar with salmon poached or broiled and 【B13】
A. A．directed
B．conducted
C．managed
D．controlled