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【简答题】
某人射击8枪,命中4枪,命中4枪中恰好有3枪连在一起的情况的种数是( )。
A.10
B.20
C.21
D.28
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【简答题】某人射击8枪,命中4枪,命中4枪中恰好有3枪连在一起的情况的种数是( )。 A.10B.20C.21D.28
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