题目

设变量满足约束条件：，则的最小值为（    ） A．            B．             C．        D． 答案：D从方框中的七个句子中选出五个句子的正确序号补全对话（5分） A：Hi, Li Ming. What are you going to do this afternoon? B：  1    Why? A：Shall we go to play basketball this afternoon? B：I’d love to, but I must do my homework at home. A.      When and where are we going to meet? B.      Are you free tomorrow? C.      How are you? D.      Nothing much. E.       Can I come? F.       Let’s play basketball tomorrow. G.      Work must come first!   A：Why don’t you do it tomorrow? B：Sorry.   2  A：You are right.   3  B：I think so.   4  A：OK. That’s a good idea. B：  5  A：We are going to meet outside the school gate at nine o’clock. B：OK. See you tomorrow. A：See you.