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【单选题】
螺纹规（螺纹样板）可以用于测量（ ）。A.
螺纹公称直径
B.
螺纹螺距
C.
螺纹长度
D.
螺纹角度
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反馈参考答案：
举一反三
【单选题】I didn't get off the train because I didn't know where to get off.
A.
Right.
B.
Wrong.
C.
Doesn't say.
【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
【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
【简答题】28 He spoke very slowly, but he still didn’t get his meaning _______. A across B cross C through D though
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