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

参考答案：

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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