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【多选题】
下列关于标准差和方差说法正确的是
A.
标准差越大,表明各个观测值分布得越分散
B.
标准差越大,表明各个观测值的离散程度越大
C.
方差是标准差的平方根
D.
方差和标准差均有量纲
E.
标准差与离散系数的量纲相同
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参考答案:
举一反三
【单选题】Which comes the first in the procedure of offering Chinese style. F&B service:
A.
Presenting the Chinese menu and beverage list.
B.
Showing the guests to the table and have them seated.
C.
Recommending Chinese liquors and Chinese style. dishes.
D.
Confirming the details of the orders.
【单选题】框架(Frame)的缺省布局管理器是()
A.
流布局(Flow Layout)
B.
卡片布局(Card Layout)
C.
边框布局(Border Layout)
D.
网格布局(Grid Layout)
【单选题】框架(Frame)的缺省布局管理器是( )。
A.
流程布局(FlowLayout)
B.
卡式布局(CardLayout)
C.
边界布局(BorderLayout)
D.
网格布局(GridLayout)
【简答题】Picturephone service, which will become available commercially in the 1970s, will at first probably be used by large business corporations.(47)It is already clear that "the next best thing to being th...
【单选题】根据这份信用证,规定受益人向银行提交的单据的期限为( )
A.
信用证签发后 15 天
B.
提单 签发后 21 天
C.
提单签发后 15 天
D.
提单签发后 5 天
【单选题】框架(Frame)的缺省布局管理器是()
A.
流布局(Flow Layout)
B.
卡布局(Card Layout)
C.
边框布局(Border Layout)
D.
网格布局(Grid Layout)
【单选题】With April 18's railway speedup, highway and air transport will have to compete with _____ service for passengers. [    ]
A.
good
B.
best
C.
better
D.
the best
【简答题】One model of library service is that collections are used so extensively that many books from heavy use. (integrate)
【单选题】若要在学生表中查找出生日期在1990~1992年之间的学生记录,则对出生日期字段设置的条件是()。
A.
Between#1990-1-1#And#1992-12-31#
B.
Form#1990-1-1#And#1992-12-31#
C.
Form#1990-1-1#And#1992-12-30#
D.
Inserte#1990-1-1#And#1992-12-31#
【单选题】________ good service, the restaurant offers different kinds of traditional Shandong Cuisine.
A.
Far from
B.
Regardless of
C.
Instead of
D.
Apart from
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