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【多选题】
某研究者在5种不同的温度下做了10次独立重复试验,共测得50个数据,根据资料条件进行单因素方差分析,下列说法正确的是A.
组间变异的自由度为4
B.
组内变异的自由度为45
C.
总变异自由度为49
D.
组间变异自由度为45
E.
组内变异自由度为4
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【简答题】听力原文： I tried this pair of shoes and I think I like this colour and style. Please pack them. By the way, I notice that all the goods in your shop are at 20% discount. And this price tag says ￡20 a pai...
【简答题】听力原文：I tried this pair of shoes and I think I like this color and style. Please pack them. By the way, I notice that all the goods in your shop are at 20% discount. And this price tag says 20 pounds a...
【多选题】旅游团在住店期间遇到火灾,导游员正确的处理方法是()。
A.
立即拨打110报警
B.
迅速通知领队和全体成员,疏散旅游者
C.
若着火点在本楼层,导游员应应率领旅游者逃向楼顶平台
D.
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A.
acceptable
B.
accessible
C.
available
D.
additional
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