立学中华 语通世界
人体内氧气与血红蛋白分离的场所是( )
We had a school English speech last week and the winner was a _______ girl from Class 2, Grade 9.
箱中装有标号为1,2,3,4,5,6且大小相同的6个球,从箱中一次摸出两个球,记下号码并放回,如果两球号码之积是4的倍数,则获奖.现有4人参与摸奖,恰好有3人获奖的概率是( )