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【简答题】
计算: ① 3 sin60°+tan60°-2cos 2 30° ② cos60° 1+sin60° + 1 tan30°
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A.
正确
B.
错误
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B.
cross-sectional
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time series
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experimental
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A.
车辆
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设备
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建筑
D.
行车
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【简答题】A set of data consists of 38 observations. How many classes would you recommend for the frequency distribution?
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A.
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【单选题】—Lucy is in front of Lily and Mike is behind Lily. So we can say Lily is______ Lucy and Mike.
A.
behind
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in front of
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between
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