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【单选题】
目前起重机上大多采用()的钢丝绳。(单选题)A.
6股
B.
8股
C.
18股
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反馈参考答案：
举一反三
【简答题】利用下面的信息,构建总体均值的置信区间: (1)总体服从正态分布,已知 (2)总体服从正态分布, (3)总体不服从正态分布, (4)总体不服从正态分布, ,置信水平为99%
【简答题】利用下面的信息，构建总体均值的置信区间。
【简答题】A in general B on average C by contrast D at length
【简答题】导体对电流的阻碍作用叫做
【单选题】The approximate average values of weight length and head circumference 1-year-old children are
A.
weight 15kg, length 65cm, head circumference 46cm
B.
weight 15kg, length 75cm, head circumference 50cm
C.
weight 10kg, length 75cm, head circumference 46cm
D.
weight 10kg, length 65cm , head circumference 46cm
E.
weight 10kg, length 85cm , head circumference 35cm
【单选题】What is the effective average sentence length in students’ writing?
A.
An average of 12-20 words
B.
A series of 10-word sentences
C.
A series of 35-word sentences
D.
None of them are right.
【单选题】The approximate average values of weight、length、and head circumference in 1-year-old children are
A.
Weight 15kg, length 65cm, head circumference 46cm
B.
Weight 15kg, length 75cm, head circumference 50cm
C.
Weight 10kg, length 75cm, head circumference 46cm
D.
Weight 10kg, length 65cm, head circumference 46cm
E.
Weight 10kg, length 85cm, head circumference 35cm
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