6. FALSE
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【\wrong answer just to be obstinate.……” 文中说，他打断其他鹦鹉，故意给出错的答案，都是因为他bored和obstinate（顽固的，难以控制的），而不是因为题干中说的他想被关注。】 7. 100 English words
【Under Pepperberg's patient tutelage（监护，指导）, Alex learned how to use his vocal tract to imitate almost one hundred English words, ……】 8. chimpanzees
【Scientists thought that chimpanzees were better subjects…】 9. avian cognition
【\been the point. My plan always was to use his imitative skills to get a better understanding of avian cognition.\】 10. particularly chosen
【Pepperberg bought Alex in a Chicago pet store where she let the store's assistant pick him out because she didn't want other scientists saying later that she'd particularly chosen an especially smart bird for her work.】 11. color
【\】 12. wrong pronunciation
【……, when one of the younger birds Pepperberg was also teaching talked with wrong pronunciation.】 13. teenager
【At this stage, he's like a teenager; he's moody, and I'm never sure what he'll do.】
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