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问答题某运动员射击10次，成绩（单位：环）如下8 10 9 9 10 8 9 9 8 7则该运动员的平均成绩是（）环
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阅读理解B
MariaMitchell(1818-1889,thefirst woman astronomer(天文学家)in the UnitedStates, was born in Nantucket
阅读理解C
Many schools have their art programs removed in an effort to improve test scores and money