题目

Customs in different countries are different. If I have dinner with a Chinese host (主人), he always puts more food onto my plates. That often discomforts（使不舒服）me greatly. I have to eat the food though I don’t want to, because it is a bad manner in the west to leave one’s food on the plate. I notice that when a Chinese sits at an American’s dinner party, he very often refuses the offer（提供）of food or drink though he wants to have them. This may be good manners in China, but it is not in the West at all. In the United States, it is impolite to keep asking someo6．计算下列各式；54×15÷2432-22×11（432-238）÷443×（86-27）36×27+14525×7×418×30÷9105÷5×17．