题目

  Different countries have different customs. When you travel to another countries，please follow their customs，just as the saying goes，“             .”   Very often people who travel to the United States forget to tip（付小费）.It is usual to tip porters who help carry your bags，taxi drivers and waiters. Waiters expect to get a 15% tip on the cost of your meal. Taxi drivers expect about the same amount.   In England，make sure to stand in line even if there are only two of you. It’s important to respect lines there. It’s a good idea to talk about th下列四种电器中，利用电流热效应工作的是（ ）A．电饭锅B．电风扇C．洗衣机D．电视机