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【单选题】
已知数字数组 =(1,0,1), =(-1,1,2),则 + 等于( )
A.
（0,2,3）
B.
（-1,2,3）
C.
（0,1,3）
D.
（0，2,3）
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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
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【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
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【单选题】It can inferred from the passage that .
A.
media coverage of events as they occur can have either good or bad results
B.
most people who had seen the video of the Rodney King beating agree with the verdict of the fury
C.
the 1992 Los Angeles riots lasted a whole week
D.
Rodney King seemed very angry when he appeared on television on Friday
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【单选题】The words 'make' and 'bus' are called ______ because they can occur unattached.
A.
derivational morphemes
B.
inflectional morphemes
C.
bound morphemes
D.
free morpheme
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【简答题】阅读理解。 My name is Gina Miller. I'm an English girl. I'm 11. I'm in No 7 Middle School. And I'm in Class 3, Grade7. I have two good friends, Li Ying and Mike. Li Ying is a Chinese girl. Her hair is blac...
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【简答题】阅读理解。 My name's Charlie Street. I'm not twelve. I'm eleven. I'm not in Grade Eight. I'm in Grade Seven. I'm in Class Two. My teacher isn't Miss Black. My teacher is Mr Grey. My phone number is 52389...
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【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.
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【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
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【单选题】In zones where earthquakes are known to occur, ______ construction techniques can significantly reduce the effects of seismic wave.
A.
to improve
B.
improving
C.
improved
D.
being improving
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【单选题】Who can predict the misery that may ______ humankind?
A.
happen
B.
befall
C.
chance
D.
occur
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【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
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【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
查看完整题目与答案
【单选题】It can inferred from the passage that .
A.
media coverage of events as they occur can have either good or bad results
B.
most people who had seen the video of the Rodney King beating agree with the verdict of the fury
C.
the 1992 Los Angeles riots lasted a whole week
D.
Rodney King seemed very angry when he appeared on television on Friday
查看完整题目与答案
【单选题】The words 'make' and 'bus' are called ______ because they can occur unattached.
A.
derivational morphemes
B.
inflectional morphemes
C.
bound morphemes
D.
free morpheme
查看完整题目与答案
【简答题】阅读理解。 My name is Gina Miller. I'm an English girl. I'm 11. I'm in No 7 Middle School. And I'm in Class 3, Grade7. I have two good friends, Li Ying and Mike. Li Ying is a Chinese girl. Her hair is blac...
查看完整题目与答案
【简答题】阅读理解。 My name's Charlie Street. I'm not twelve. I'm eleven. I'm not in Grade Eight. I'm in Grade Seven. I'm in Class Two. My teacher isn't Miss Black. My teacher is Mr Grey. My phone number is 52389...
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【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.
查看完整题目与答案
【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
查看完整题目与答案
【单选题】In zones where earthquakes are known to occur, ______ construction techniques can significantly reduce the effects of seismic wave.
A.
to improve
B.
improving
C.
improved
D.
being improving
查看完整题目与答案
【单选题】Who can predict the misery that may ______ humankind?
A.
happen
B.
befall
C.
chance
D.
occur
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