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【单选题】
应用帮助命令的快捷键一般是______。
A.
F2
B.
F3
C.
F1
D.
F6
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【简答题】设随机变量X的概率密度为f(x),已知f(-x)=f(x),(x>0),而F(x)为X的分布函数.则有P{|X|>a}= (a) 2[1-F(a)]    (b) 2F(a)-1    (c) 1-F(a)    (d) 1-2F(a)
【简答题】Match the words with the definition. Find the words in the article to read them in context. The paragraph numbers will help you. A __________ is a change from one thing to the next, either in action o...
【简答题】II. Find the words or phrases that fit the meaning in italics. To design a new bridge, a statistical study is made of the amount of traffic the bridge will expect to carry (par.2)
【简答题】Match the words with the definition. Find the words in the article to read them in context. The paragraph numbers will help you. A __________ is a change from one thing to the next, either in action o...
【判断题】设 X 为一随机变量 ,F(x) 为 X 的分布函数 , 则有 P{X ≤ 2}=F(2) 。
A.
正确
B.
错误
【简答题】Go through the whole passage and try to understand its structure with reference to the outline in the exercise. 2. Check the new words and expressions of Para. 1-6 in the dictionary. Note down their C...
【多选题】设连续型随机变量X的分布函数为F(x),则有(    ).
A.
P(X>b)=1-F(b)
B.
P(X=a)=0
C.
P(X〉b)=1+F(b) D. P(X=a)=1
【多选题】设连续型随机变量X的分布函数为F(x),则有(    ).
A.
P(X>b)=1-F(b)      
B.
P(X=a)=0
C.
【简答题】案例: 《美术字设计》教学反思:这是一节字体设计课,课前我自己绘制了大量有代表性的变体美术字作品,通过运用多媒体使学生欣赏这些千姿百态的变体字,帮助学生自主探究变体美术字的装饰、变化规律。这样能够激起学生的创作思路。 在这节课上,我注重教学的灵活性,比如:第一步打格,第二步写单线,第三步写双线,这样学生学起来枯燥无味,不感兴趣。我把课题拟定为《字的联想》,教学中紧扣“联想”突出趣味性,通过学生的联...
【简答题】Find the words in the text which mean the opposite of the following words.(Unit 6 P 101 Working with words 1(横向顺序)
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