题目: 从标有1、2、3、4的四张卡片中任取两张,和是偶数的可能性是______. 答案: 这两个数的和是奇数:1+2=3,1+4=5,2+3=5,3+4=7,两个数的和是偶数:1+3=4,2+4=6,偶数占总数的几分之几:2÷6=13.故答案为:13.
题型:选择题 一Would you mind me keeping the book for another two weeks? —__________.I have finished it anyway. A.It depends B.You’re welcomeC.No problemD.Yes, please. 查看答案