题目

China is a nation of etiquette (礼仪). Chinese people are _____ the most hospitable (好客的) people in the world. If ____ visit a Chinese family, they would be ____ at the warmth that they would receive as guests.When you visit a Chinese family, the host usually makes tea for you and ______ you snacks like biscuits or candy. Someone in the family will also chat with you, never letting you feel __.At the same time, other family members will be busy _______ a meal for you. Chinese people treat their guests ____ a big meal. They always present more food than the guests can eat. On the table,已知函数f(x)=ax(a＞0，且a≠1)满足f(2)=81，则f(12)=33．