题目

What is the probable relationship between the speakers?A. Boss and employee. B. Waiter and customer. C. Co-workers. 答案：【答案】C【解析】M: Want to go to lunch today? That new restaurant across from the office is supposed to be good.W: I can’t. I brought my own lunch today because the boss told me to finish some writing. I need to stay in the office.M: All right. Maybe next time.此为听力题，解析略。已知x、y是实数，且满足y=2x-6+6-2x-12，试求yx的值．