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【简答题】
设随机变量 和 都服从标准正态分布, 和 服从同一个指数分布,其概率密度函数为 .设 相互独立,且记随机变量 , .问:(1)随机变量 服从什么分布?其概率密度函数是什么?数学期望和方差各是多少?(2)随机变量 和 的协方差是多少? 和 是否相互独立?(3)随机变量 的数学期望与方差分别是多少?(4) 的概率密度函数是什么?
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【多选题】网络商务信息发布是( )。
A.
网络营销的一项基本职能
B.
将已形成的有价值的信息发布到报纸上去
C.
网络营销最常用的方法之一
D.
将已形成的有价值的信息通过电台发送
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【单选题】网络商务信息发布的基本内容是( )
A.
产品和服务信息
B.
网上广告
C.
邮件列表
D.
网络促销
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【单选题】网络商务信息发布的基本内容是()。
A.
准确性
B.
适度性
C.
及时性
D.
经济性
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【简答题】Home ownership became a priority once ______.
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【单选题】Why does the professor discuss private ownership of a lake?
A.
To argue that it is not necessary to regulate a resource
B.
To contrast private ownership with government regulation
C.
To show that private ownership is not always managed well
D.
To give an example of a project that was too expensive
查看完整题目与答案
【单选题】When determining whether independence is impaired because of an ownership interest in a client company, materiality will affect ownership:
A.
in all circumstances.
B.
only for direct ownership.
C.
only for indirect ownership.
D.
under no circumstances.
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【单选题】In many countries with concentrated ownership( )
A.
the conflicts of interest between shareholders and managers are worse than in countries with diffuse ownership of firms.
B.
the conflicts of interest are greater between large controlling shareholders and small outside shareholders than between managers and shareholders.
C.
the conflicts of interest are greater between managers and shareholders than between large controlling shareholders and small outside shareholders.
D.
corporate forms of business organization with concentrated ownership are rare.
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【判断题】星号活性的酶对反应条件要求较严格
A.
正确
B.
错误
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【判断题】Social ownership is any of various encompasses public ownership, employee ownership, cooperative ownership, citizen ownership of equity, common ownership and collective ownership
A.
正确
B.
错误
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【简答题】如果正反杂交试验获得的F1 表现不同,这可能是由于(1)性连锁;(2)细胞质遗传;(3)母性影响。你如何用试验方法确定它属于哪一种情况?
查看完整题目与答案
相关题目：
【多选题】网络商务信息发布是( )。
A.
网络营销的一项基本职能
B.
将已形成的有价值的信息发布到报纸上去
C.
网络营销最常用的方法之一
D.
将已形成的有价值的信息通过电台发送
查看完整题目与答案
【单选题】网络商务信息发布的基本内容是( )
A.
产品和服务信息
B.
网上广告
C.
邮件列表
D.
网络促销
查看完整题目与答案
【单选题】网络商务信息发布的基本内容是()。
A.
准确性
B.
适度性
C.
及时性
D.
经济性
查看完整题目与答案
【简答题】Home ownership became a priority once ______.
查看完整题目与答案
【单选题】Why does the professor discuss private ownership of a lake?
A.
To argue that it is not necessary to regulate a resource
B.
To contrast private ownership with government regulation
C.
To show that private ownership is not always managed well
D.
To give an example of a project that was too expensive
查看完整题目与答案
【单选题】When determining whether independence is impaired because of an ownership interest in a client company, materiality will affect ownership:
A.
in all circumstances.
B.
only for direct ownership.
C.
only for indirect ownership.
D.
under no circumstances.
查看完整题目与答案
【单选题】In many countries with concentrated ownership( )
A.
the conflicts of interest between shareholders and managers are worse than in countries with diffuse ownership of firms.
B.
the conflicts of interest are greater between large controlling shareholders and small outside shareholders than between managers and shareholders.
C.
the conflicts of interest are greater between managers and shareholders than between large controlling shareholders and small outside shareholders.
D.
corporate forms of business organization with concentrated ownership are rare.
查看完整题目与答案
【判断题】星号活性的酶对反应条件要求较严格
A.
正确
B.
错误
查看完整题目与答案
【判断题】Social ownership is any of various encompasses public ownership, employee ownership, cooperative ownership, citizen ownership of equity, common ownership and collective ownership
A.
正确
B.
错误
查看完整题目与答案
【简答题】如果正反杂交试验获得的F1 表现不同,这可能是由于(1)性连锁;(2)细胞质遗传;(3)母性影响。你如何用试验方法确定它属于哪一种情况?
查看完整题目与答案