单选题Adam’s dog, a golden retriever named Hans, can respond to over 150 different commands. Adam cites this fact as evidence for his claim that Hans can understand the English language. Which of the following, if true, casts the most doubt on Adam’s claim that Hans can understand the English language?AEach of the 150 commands to which Hans responds involves both a spoken word in English and a distinctive hand sign.BHans does not respond to the same commands when spoken to him by Adam’s French and Italian friends in their own languages.CScientists have demonstrated conclusively that canine vocal chords are incapable of replicating many of the sounds used in the English language.DAnimal behaviorists have demonstrated that even very young dogs surpass both wolves and chimpanzees—animals that are thought to be more intelligent than dogs—in the ability to understand human nonverbal communication.EThe golden retriever is widely considered to be less intelligent than the border collie, and no border collie has ever been shown to truly understand the English language.
单选题
Adam’s dog, a golden retriever named Hans, can respond to over 150 different commands. Adam cites this fact as evidence for his claim that Hans can understand the English language. Which of the following, if true, casts the most doubt on Adam’s claim that Hans can understand the English language?
A
Each of the 150 commands to which Hans responds involves both a spoken word in English and a distinctive hand sign.
B
Hans does not respond to the same commands when spoken to him by Adam’s French and Italian friends in their own languages.
C
Scientists have demonstrated conclusively that canine vocal chords are incapable of replicating many of the sounds used in the English language.
D
Animal behaviorists have demonstrated that even very young dogs surpass both wolves and chimpanzees—animals that are thought to be more intelligent than dogs—in the ability to understand human nonverbal communication.
E
The golden retriever is widely considered to be less intelligent than the border collie, and no border collie has ever been shown to truly understand the English language.
参考解析
解析：
A项揭示Hans可以理解150种不同的指令是因为狗可能对不同的手势有反应，这为狗的行为提供了另一种不同的解释，所以A项是正确的。
A项揭示Hans可以理解150种不同的指令是因为狗可能对不同的手势有反应，这为狗的行为提供了另一种不同的解释，所以A项是正确的。
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