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翻译:How old are you ?
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A.
Many animals have poor eyesight while their sense of smell, is quite good.
B.
Dogs are color blind.
C.
The human sense of smell is not good.
D.
Dogs can see no more than shades of gray.
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【简答题】在影响行业生命周期的技术进步因素中，最重要也是首先需要考虑的因素是（ ）。
【简答题】在影响行业生命周期的技术进步因素中，最重要也是首先需要考虑的是（ ）。
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