补全对话。
A: ____ me. I'm new here. I want to send a letter. Where is the ____?
B: It's over there.
A: Thanks. And I'm ill now. Where is the ____?
B: It's ____(挨着) the school.
A: Thank you very much.
B: You're ____.
读“我国耕地、水资源比重图”,回答问题。
甲车行驶30km与乙车行驶40km所用时间相同.已知乙车比甲车每小时多行驶15km,设甲车的速度为xkm/h,依题意,下面所列方程正确的是( )