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【多选题】
下列描述中正确的是(    )。
A.
置信区间是在一定的几率范围内,估计出来的包含可能参数在内的一个区间
B.
保证参数在置信区间内的几率称为置信度
C.
置信度愈高,置信区间就可能
D.
置信度愈高,置信区间就可能愈窄
E.
在一定置信度下,适当增加测定次数,置信区间会缩短
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参考答案:
举一反三
【单选题】下列光中,波长最短的是( )。
A.
紫外线
B.
红外线
C.
黄光
D.
蓝光
【单选题】An action that is lavishly rewarded as soon as it is performed is well on its way to becoming a habit.
A.
promptly
B.
generously
C.
evidently
D.
sympathetically
【单选题】An antifreeze is a liquid that is added to water to keep it from freezing. When water freezes and becomes into ice, it expands. The force of water of expanding is so great that it can break the hardes...
A.
to help to sell antifreezes
B.
to explain what antifreezes are
C.
to compare ethylene glycol with alcohol
D.
to tell what kind of antifreeze to choose
【单选题】据有关媒体报道,在我国,排污权交易的第一个典型案例出现在江苏省。2002年夏,江苏省太仓市计划扩建太仓港环保发电有限公司,但在设计方案中每年二氧化硫排放超标2000吨,工程面临搁置的困境。而当时南京下关电厂每年二氧化硫的实际排污量比核定量少了3000吨。于是在江苏省环保厅的协调下,双方实施排污权交易。从2003年7月起至2005年,“太仓港”每年从南京市下关发电厂异地购买1700吨的二氧化硫排污权...
A.
外部性
B.
内部性
C.
信息风险性
D.
信息确定性
【单选题】It has been said that management is a science and that leadership is an art. Management is comprised of concrete, measurable skills: planning, organizing, directing, and controlling. Thumb through any...
A.
management skills
B.
leadership principles
C.
the qualities that define management
D.
the distinction between management and leadership
【简答题】仪器设备在使用之前要先预热,为什么?
【单选题】That is __ __ American national flag. There fifty stars on it. [     ]
A.
a: is
B.
an; are
C.
an; is
【单选题】盥沐的正确读音是( )
A.
gu à n m ù
B.
pén m ù
【单选题】An action that is lavishly rewarded as soon as it is performed is well on its way to becoming a habit.
A.
promptly
B.
abruptly
C.
evidently
D.
generously
【判断题】布巾盘点以后,计算布巾补充量的方法是:上次盘点总数减去当日盘点总数。
A.
正确
B.
错误
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