【简答题】When a student is called upon to answer a question in class, usually he/she is delivering a/an _______ speech.
【简答题】设定义在R 1 上的函数f(x)满足 |f(x)-f(y)|≤e |x|+|y| |x-y| (x,y∈R 1 ). 若 ,m(E)=0,则m(f(E))=0.
【多选题】设A,B为两个事件,以下哪些表述是不正确的( )。
A.
若A,B相互包含,则P(A∪B)=P(A)+P(B)
B.
若A,B互不相容,则P(A∪B)=P(A)+P(B)
C.
若A,B相互独立,则P(AB)=P(A)·P(B)
D.
若A,B互不相容,则P(AB)=P(A)P(B)
【单选题】Which of the following should you avoid when delivering an impromptu speech?
A.
Using signposts to identify each new point.
B.
Rambling or repeating yourself.
C.
Wrapping things up quickly at the end of the speech.
D.
Looking calm and assured.
【单选题】表单里有一个选项按钮组,包含两个选项按钮option1和option2,假设option2没有设置click事件代码,而option1以及选项按钮组合表单都设置了click事件代码,那么当运行表单时,如果用户单机option2是,系统将()
【单选题】Which characteristic of communication is reflected in the following example? A scientist uses some plain words to replace some terms or jargons when delivering an academic speech to some middle school...
A.
Communication is self-reflective.
B.
Communication is contextual.
C.
Communication is transactional.
D.
Communication is symbolic.
【多选题】法律事实是建设工程法律关系产生、变更和消灭的原因。法律事实按是否包含当事人的意志力分为两类( ):
【多选题】设A,B为两个事件,以下哪些表述是不正确的( )。
A.
若A,B相互包含,则P(A∪B)=P(A)+P(B)
B.
若A,B互不相容,则P(A∪B)=P(A)+P(B)
C.
若A,B相互独立,则P(AB)=P(A)·P(B)
D.
若A,B互不相容,则P(AB)=P(A)P(B)
【判断题】若随机变量X与Y的二阶矩有E[XY] = 0,则E[X]E[Y] = 0