题目

 -______?  -No. In Beijing. A. Where are you from   B. Does he live in Paris  C. Can he go to Paris 答案：B长为L的铁棒欲水平通过宽分别为2.5米和1.28米的两个互相垂直的走廊的拐角，铁棒能通过时L的最大值为________．