2. 外语
  3. Humans like to regard themselves as exceptional. Many philosophers believe humans are the only【C1】______which understands that o

Humans like to regard themselves as exceptional. Many philosophers believe humans are the only【C1】______which understands that o

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问题     Humans like to regard themselves as exceptional. Many philosophers believe humans are the only【C1】______which understands that others have their own personal thoughts. That understanding is known in the【C2】______as having a "theory of mind," and it is considered the  【C3】______to such cherished human【C4】______as sympathy and deception.
   Biologists have learned to treat such【C5】______with caution. Bemd Heinrich and Thomas Bugnyar describe an experiment they have carded out【C6】______ravens.
    【C7】______to gaze is reckoned to be a good【C8】______of the development of theory of mind in human children. 【C9】______about 18 months, most children are able to follow the gaze of another person, and【C10】______things about the gazer from it. Failure to【C11】______this trick is an early symptom of autism, a syndrome whose main underlying feature is a(n) 【C12】______to understand that other people have【C13】______, too.
   To【C14】______whether ravens could follow gaze, Dr Heinrich used six six-month-old hand-reared ravens. The birds were set, one at a time, on a perch on one side of a room divided by a barrier. An experimenter in front of the barrier【C15】______his head and eyes in a particular【C16】______and gazed for 30 seconds before looking【C17】______. Dr Heinrich found that all the birds were able to follow the gaze of the experimenters, even【C18】______the barrier. In the【C19】______case, the curious birds either jumped down from the perch and walked around the barrier to have a【C20】______or leapt on top of it and peered over.
【C18】
选项 A、into
B、within
C、beyond
D、from
答案C
解析 该题考查介词用法。into表示向内；within表示内部；beyond表示越过；另一边；from表示从…。根据前文“实验者发现全部渡鸦都能追随实验者的目光，甚至能够…”以及后文的“障碍物”可知，此处表达的意思是渡鸦甚至能够越过障碍物而追踪实验者的目光。beyond the barrier表示越过障碍物，符合文意，故选C。
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