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【判断题】
GB/T 6952-2015是国家强制性标准。A.
正确
B.
错误
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【简答题】People are grateful to Carter Dunham for his efforts to People are grateful to Carter Dunham for his efforts to___________．
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【单选题】Though he is busy, music has always been___his work.
A.
as much a part of his life as
B.
as a part of his life much as
C.
as much as a part of his life
D.
so much a part of his life as
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A.
弗里德曼(Friedman)检验
B.
Wilcoxon符号秩检验
C.
Mann-Whitney检验
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