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【单选题】
Although an increasing number of companies began to support limitation on emission, there are still some companies that do the opposite.
A.
Y
B.
N
C.
NG
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参考解析：
知识点：
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举一反三
【多选题】直流电机换向时,火花产生的原因有( )原因。
A.
电流
B.
机械
C.
化学
D.
电磁
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【单选题】设随机变量X的分布律为 X -2 0 2 P 0.4 0.3 0.3 则E(3X 2 +5)=(    )
A.
-0.2    
B.
2.8    
C.
6.4    
D.
13.4
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【简答题】设随机变量X的分布律为 X 0 1 2 3 P 0.1 A 0.3 0.2 求
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【简答题】设随机变量X的分布律为P{X=k}=1/4(k=1，2，3，4)，函数Y=eosπX．求二维随机变量(X，Y)的联合分布律．
查看完整题目与答案
【单选题】设随机变量X的分布律为 X -2 0 2 P 0.3 0.2 0.5 则Y=|X|的分布列为(    )
A.
X 2 0 2 P 0.3 0.2 0.5
B.
X 0 2 P 0.2 0.8
C.
X -2 0 2 P 0.09 0.04 0.25
D.
X 0 2 P 0.04 0.14
查看完整题目与答案
【多选题】Bronze ware was a unique national treasure because of ( )
A.
impressive designs
B.
classical decorative ornamentation
C.
priceless lightness
D.
wealth of inscriptions
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【单选题】听力原文：M: Would you pass me the sports section，please? W: Sure, if you give me the classified ads and local news section. Q: What are the speakers doing? (19)
A.
Talking about sports.
B.
Writing up local news.
C.
Reading newspapers.
D.
Putting up advertisements.
查看完整题目与答案
【单选题】Passage Two
A.
The difference between classical music and rock music.
B.
Why classical music is popular with math students.
C.
The effects of music on the results of math tests.
D.
How to improve your reasoning ability.
查看完整题目与答案
【简答题】设随机变量X的分布律为 X 0 1 2 3 P 0.1 A 0.3 0.2 求(1)常数A；(2)P(0.5≤X＜2)．
查看完整题目与答案
【单选题】This passage mainly discusses _____.
A.
causal reasoning
B.
various types of reasoning
C.
classification of cause
D.
the causal process
查看完整题目与答案
相关题目：
【多选题】直流电机换向时,火花产生的原因有( )原因。
A.
电流
B.
机械
C.
化学
D.
电磁
查看完整题目与答案
【单选题】设随机变量X的分布律为 X -2 0 2 P 0.4 0.3 0.3 则E(3X 2 +5)=(    )
A.
-0.2    
B.
2.8    
C.
6.4    
D.
13.4
查看完整题目与答案
【简答题】设随机变量X的分布律为 X 0 1 2 3 P 0.1 A 0.3 0.2 求
查看完整题目与答案
【简答题】设随机变量X的分布律为P{X=k}=1/4(k=1，2，3，4)，函数Y=eosπX．求二维随机变量(X，Y)的联合分布律．
查看完整题目与答案
【单选题】设随机变量X的分布律为 X -2 0 2 P 0.3 0.2 0.5 则Y=|X|的分布列为(    )
A.
X 2 0 2 P 0.3 0.2 0.5
B.
X 0 2 P 0.2 0.8
C.
X -2 0 2 P 0.09 0.04 0.25
D.
X 0 2 P 0.04 0.14
查看完整题目与答案
【多选题】Bronze ware was a unique national treasure because of ( )
A.
impressive designs
B.
classical decorative ornamentation
C.
priceless lightness
D.
wealth of inscriptions
查看完整题目与答案
【单选题】听力原文：M: Would you pass me the sports section，please? W: Sure, if you give me the classified ads and local news section. Q: What are the speakers doing? (19)
A.
Talking about sports.
B.
Writing up local news.
C.
Reading newspapers.
D.
Putting up advertisements.
查看完整题目与答案
【单选题】Passage Two
A.
The difference between classical music and rock music.
B.
Why classical music is popular with math students.
C.
The effects of music on the results of math tests.
D.
How to improve your reasoning ability.
查看完整题目与答案
【简答题】设随机变量X的分布律为 X 0 1 2 3 P 0.1 A 0.3 0.2 求(1)常数A；(2)P(0.5≤X＜2)．
查看完整题目与答案
【单选题】This passage mainly discusses _____.
A.
causal reasoning
B.
various types of reasoning
C.
classification of cause
D.
the causal process
查看完整题目与答案