单选题：According to scientists ,people sneeze because

题目分类：公共英语三级
题目类型：单选题
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题目内容：

According to scientists ,people sneeze because A．they are ill
B．to sneeze is human nature
C．they do not need any conscious help
D．there are unwanted things in their noses

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答案解析：

统计量的概率分布构成了推断总体参数的理论基础。（　　）

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