题目

维恩图的作用是什么？它的操作方法是什么？ 答案：维恩图的作用是梳理学生的观察比较结果，形成比较明确的概念，并显示这些概念之间的关系。维恩图的操作方法：先把大树和小草的特点分别写在各自的框里，然后对照两边的特点，把共有的特点写入交叉的位置，再把两边共有的特点划掉。Complete the dialogue. A: Excuse me, I am going to the shopping centre. 1   B: Oh, well. Walk along this road and take the second turning on the right. A: How far is it from here? B: Mm, it's about seven or eight minutes' walk. A: Thank you very much. B: That's all right. (Ten minutes later.) C: What can I do for you? A: 2　　 a new shirt. Would you show me some? C: Certainly. The light blue one is very nice, I think. 3　　   A: That's fine, Where is the changing room（更衣室）? C: Over there. This way, please. A: Oh, it looks so nice, but it's a little small. Do you have Size L? 4　　  C: 240 yuan. A: 5　　   Can it be cheaper? I only have 200 yuan. C: That's OK. You can take it. A: Thank you. Size L, please. Here is the money.