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【单选题】
有一直径为d的钢丝，绕在直径为D圆筒上，钢丝仍处于弹性范围，为了减小弯曲应力，应（）钢丝的直径.A.
减少
B.
增大
C.
与增减直径无关
D.
以上答案都不对
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反馈参考答案：
举一反三
【多选题】下列关于离散系数说法正确的有( )。
A.
变量风险单位离散趋势的绝对指标称离散系数
B.
标志值的离散程度越大，其业务稳定性越好
C.
离散系数很多，最常用的是标准差系数
D.
标志值的离散程度越小，其业务稳定性越好
E.
标志值的离散程度越小，其业务稳定性越差
【单选题】That was the first time I _______ there and I was impressed by the friendly people very muchA．go
A.
29. That was the first time I _______ there and I was impressed by the friendly people very much A．go
B.
was going
C.
had gone
D.
have gone
【单选题】That was the first time I _______ there and I was impressed by the friendly people very much
A.
go
B.
was going
C.
had gone
D.
have gone
【判断题】We don’t have to debate on one thing, that is, a healthy diet means balanced nutrition.()
A.
正确
B.
错误
【简答题】离散系数 名词解释
【简答题】离散系数比标准差更适用于比较两组数据的离散程度，这是因为离散系数（ ）。
【单选题】It was the first time I _______ there and I was impressed by the friendly people very much.
A.
go
B.
was going
C.
had gone
D.
have gone
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