题目

阅读对话从每题ABCD四个选项中选出一个最佳答案完成对话。A: Good morning.     1  B: Yes , please .I ’d like to buy a tie for my brother.A:     2   B: Blue. My brother likes blue best.A: How about this one?B: Oh, it’s very nice. __  3    A: 50 yuan.B: That’s too expensive. I can’t afford it.    4   A: Yes. This light blue one is only 30 yuan.B: Well, this one looks very good. And the price is OK.    5  【小题1】A Can I help you?B What’s wrong?C How are you?D Would you like something?【小题2】A What’s his job?B How old is he如图所示，a、b、c为电场中同一条水平方向电场线上的三点．a、b电势分别为φa=5V，φb=3V．下列叙述正确的是（　　）A、该电场在c处的电势一定为4VB、a点处的场强Ea一定大于b点处的场强EbC、一正电荷从c点运动到b点电势能一定增加D、一正电荷运动到c点时受到的电场力一定由c到b