题目

补全对话。根据对话内容，从下边方框中选出适当的选项补全对话，并将选项的编号依次填人题前括号内。   A：Excuse me．     1    B：Yes，and you are…?   A：____2__. This is my membership card．Would you please show me your passport?   B：OK．___3___.    A：Welcome to Beijing，Miss White．I am so glad that you are the first guest I have received．   B：Thank you，Miss Chen. _4____.   A： Let me help you with your suitcase．Our car is waiting for us just at the entrance. It will       take us to the hotel．如图甲所示的电路，电源电压保持不变．闭合开关S，调节滑动变阻器，两电压表的示数随电路中电流变化的图线如图乙所示．根据图线的信息可知： （甲/乙）是电压表V2示数变化的图线，电源电压为 V，电阻R1的阻值为 Ω，电阻R2的最大功率是 W．