运输需求的收入弹性
参考答案：只适用于分析客运需求的变动，用来表示客运需求对消费者收入变动的反应程度敏感程度。
“正面防御型”辩护证据
It takes the most cool-headed and good-tempered of drivers to resist the temptation to make reprisals when subjected to uncivilized behavior.
A．challenge
B．laugh
C．revenge
D．appreciate
