________ students often find it difficult to live

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Edward did not ______the description of any secret

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权等于1时称为单位权,权不等于1的中误差称为单位权中误差。A) 正确B) 错误

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观测量的精度指标有:(1)方差与中误差;(2)极限误差;(3)相对误差。A) 正确B) 错误

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The writer of this text, Henry Graham Greene, is a

The writer of this text, Henry Graham Greene, is a well-known [_] novelist.A.Ame

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