问题描述：
Can you tell me what is the population of the world和Can you tell me what the population of the world is哪个对
为什么 Can you tell me what is the matter正确而Can you tell me what is the population of the world不正确
为什么 Can you tell me what is the matter正确而Can you tell me what is the population of the world不正确
问题解答：
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