题目内容
（）关键字表示定义一个函数。
查看答案
搜索结果不匹配？点我反馈
更多问题
打开文件可以使用（）函数实现。
Luxury goods are products and services that are not considered essential and associated with 1. The concept of luxury has been present in various forms since the beginning of civilization. Its role was just as important in ancient western and eastern empires 2 it is in modern societies. With the clear differences between social classes in earlier civilizations, the 3 of luxury was originally limited to the elite classes.In economics, a luxury good is a good for which demand increases more than proportionally as income rises, and is a 4 to a “necessity good”, for which demand increases proportionally 5 than income. Luxury goods are often 6 with superior goods.Luxury goods are said to have high income elasticity of demand: as people become wealthier, they will buy more and more of the luxury good. This also means, however, that should there be a 7 in income its demand will drop. Income 8 of demand is not constant with respect to income, and may change sign at different levels of income. That is to say, a luxury good may become a normal good or even an 9 good at different income levels, e.g. a wealthy person stops buying increasing numbers of luxury cars for his automobile 10 to start collecting airplanes.
冲突抑制的策略包括（）。
影响有效沟通的因素有三大障碍，其中组织障碍包括（）。
微信支付 
支付宝支付