题目

听下面一段较长对话，回答以下小题。【1】Where does the conversation take place?A.In a stadium. B.At a gift shop. C.At a university.【2】What does the woman offer to buy for the man?A.Tickets. B.A souvenir. C.Food and drink. 答案：【答案】【1】A【2】C【解析】【原文】W: It looks like this game is completely sold out. How many people do you think are here right now?M: There are 20,000 seats in here. Have you ever been to a professional basketball game before?W: Only the ones at my university. Thanks again for buying the tickets. How much do I owe you?M: It’s my treat. You can buy the next tickets. Why don’要使2x-1•2x+1有意义，x的取值范围是（　　）A．x≥12B．x≥-12C．-12≤x≤12D．任何实数