第15题: [单项选择]某校食堂今日供应茄子、鸡丁、辣椒三种菜色,规定每人最多只能选择两种不同的菜。请问,至少在几位同学中才一定有两个人选择了相同的菜色( ) A. 4 B. 5 C. 6 D. 7 参考答案:D 答案解析:[解析] 菜色选择的方案有以下几种:(1) 茄子;(2) 鸡丁;(3) 辣椒;(4) 茄子、鸡丁;(5) 鸡丁、辣椒;(6) 茄子、辣椒。最不巧的情况是有6位同学分别选择了上述六种方案,那么接下来的一
第28题: [单项选择]What does the man want to know A. If he’’ll have time to eat in Chicago. B. Where the bus station is located. C. When buses depart for Chicago. D. If he can catch a bus that leaves Chicago. 参考答案:C 答案解析:M: Do you know if the bus station has timetables for buses to Chicago
W: They may not, but I know