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【单选题】
What happened to the young guy?
A.
He almost hit the texi driver's car.
B.
The guy didn't miss the taxi driver's car by just inches.
C.
The taxi driver shouted at him.
D.
I abused him.
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举一反三
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A.
0.3
B.
0.7
C.
0.2
D.
0.5
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A.
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B.
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【单选题】若事件A与事件B互不相容,且P(A)=0.5, P(B) =0.2 , 则 P(A-B )=( )
A.
0.3
B.
0.7
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0.2
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0.5
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A.
泻火止痛
B.
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C.
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D.
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E.
理气止痛
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A.
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B.
纯种长毛垂耳狗的形成
C.
因工业污染而使某种蛾子发生黑化
D.
某些细菌对抗生素的抗性
【简答题】若事件A与事件B互不相容,且P(A)=0.5, P(B)=0.2 , 则 P(A-B)=____
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