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【简答题】
Please fill in the blanks with the correct form of the words below. imply superficial disguise dodge casualty 1. It is impossible to ________ the fact that business is bad. 2.There were ten serious ________ in the train crash. 3. He gave a speech,which was just a very _______ analysis of the situation. 4.Are you _______ that we are not telling the truth. 5.Tom _______ the falling rock and escaped unhurt.
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参考答案:
举一反三
【单选题】随机变量X服从标准正态分布N(0,1).若【图片】取值为0.1,0.3,0.5,0.7,0.9,则对应的【图片】值分别是:
A.
1.2816,0.5244,0,-0.5244,-1.2816
B.
-1.2816,-0.5244,0,0.5244,1.2816
C.
1.2816,-0.5244,0,0.5244,-1.2816
D.
-1.2816,0.5244,0,-0.5244,-1.2816
【多选题】若由n个随机变量构造的统计量服从χ^2分布,则需满足下列哪些要求() A 随机变量X_1,X_2,......,X_n相互独立 B X_i(i=1,2......,n)服从标准正态分布N(0,1) C 随机变量的和 服从χ^2分布 D 随机变量的平方和 服从分布 E 自由度是n+1 F 自由度是n
A.
随机变量X_1,X_2,……,X_n相互独立
B.
X_i(i=1,2……,n)服从标准正态分布N(0,1)
C.
随机变量的和 服从χ^2分布
D.
随机变量的平方和 服从分布
E.
自由度是n+1
F.
自由度是n
【单选题】对柳永《八声甘州》词句解释不正确的一项是( )
A.
开头两句写雨后江天,澄澈如洗,一个“对”字就写出登临纵目、望尽天涯的境界
B.
“苒苒物华休”指美好的景物逐渐凋残
C.
“何事苦淹留”:不知道什么原因流连于此,不忍离去
D.
“正恁凝愁”:许多愁绪凝结,如此难以排解
【简答题】Suggestopaedia believes that language learning can occur at a much faster rate than it is often expected if learners can make better use of their______ powers.
【单选题】Risks associated with nuclear power ______.
A.
can only occur at the plant Site
B.
may occur when wastes are transported or recycled
C.
are limited to structural problems within the plant
D.
are primarily a result of carelessness
【单选题】随机变量X服从标准正态分布N(0,1).若【图片】取值为0.1,0.3,0.5,0.7,0.9,则对应的【图片】值分别是:
A.
-1.2816,-0.5244,0,0.5244,1.2816
B.
1.2816,0.5244,0,0.5244,1.2816
C.
1.2816,0.5244,0,-0.5244,-1.2816
D.
-7.2816,-0.5244,0,0.5244,7.2816
【单选题】设随机变量X服从标准正态分布N(0,1),则E(X )=
A.
2e -2
B.
2e²
C.
-2e²
D.
【简答题】Suggestopaedia believes that language learning can occur at a much faster rate than it is often expected if learners can make better use of their______ powers.
【单选题】X服从正态分布N(4,25),下面哪个随机变量服从标准正态分布N(0,1)?
A.
(X-2)/25
B.
(X-2)/5
C.
(X-4)/25
D.
(X-4)/5
【单选题】Who can predict the misery that may ______ humankind?
A.
happen
B.
befall
C.
chance
D.
occur
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