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【多选题】
对于数据个数等于n，因素A有r个水平，因素B有s个水平的无交互效应的双因素方差分析，叙述正确的有（）A.
误差的偏差平方和除以 S 2 的自由度是s-1
B.
因素B的偏差平方和除以 S 2 的自由度是（r-1）（s-1）
C.
总偏差平方和除以 S 2 的自由度是rs-1
D.
因素A的偏差平方和除以 S 2 的自由度是r-1
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【单选题】Why is Yellowstone National Park important?( )
A.
Because it is the first national park in the world.
B.
Because it is in America.
C.
Because it is the biggest national park in America.
D.
Because it is the first national park in America.
【单选题】(真题2011-S93) 患者,男,63岁,因下肢不适6个月来院就诊,被诊断为下肢静脉曲张,护士最有可能观察到的临床表现是
A.
皮肤溃疡
B.
足部水肿
C.
下肢酸胀乏力
D.
下肢静脉迂曲、隆起
E.
足部皮肤苍白、发冷、肌肉萎缩
【简答题】The National Gallery Description: The National Gallery is the British national art museum built on the north side of European art ranging from 13th-century religious paintings to more modern ones by R...
【简答题】国际民用航空组织的简称是 。
【单选题】The sentenc e “ _____ ” does not belong to the T en Commandments .
A.
Thou shalt not kill
B.
Neither shalt thou commit adultery
C.
Neither shalt thou steal
D.
Ne ith er shalt thou lie
【单选题】D The National Gallery Description: The National Gallery is the British national art museum built on the north side of Trafalgar Square in London. It houses a diverse collection of more than 2,300 exa...
A.
The 13th.
B.
The 17th.
C.
The 18th.
D.
The 20th.
【简答题】The National Gallery Description： The National Gallery is the British national art museum built on the north side of Trafalgar Square in London.It houses a diverse collection of more than 2,300 exampl...
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