甲、乙、丙三人同时对一架飞机射击,相互之间无影响,命中率分别为0.4,0.5,0.7,则飞机被击中的概率是_______

甲、乙、丙三人同时对一架飞机射击,相互之间无影响,命中率分别为0.4,0.5,0.7,则飞机被击中的概率是__________.

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When does the Wild West Show begin?

When does the Wild West Show begin?A.At 10 a.m. weekdays. B.At 2 p.m. on weekend

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听第7段材料,回答题。 Where does this conversation take place?

听第7段材料,回答题。 Where does this conversation take place?A.In a concert hall. B.In a

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