精选优质文档-倾情为你奉上张汉熙版高级英语第二册 lesson 1 课后练习答案习题全解 I. Las Vegas. Las Vegas city is the seat of Clark County in South Nevada. In 1970 it had a population of 125,787 people. Revenue from hotels, gambling, entertainment and other tourist-oriented industries forms the backbone of Las Vegass economy, Its nightclubs and casinos are world famous. The city is also the commercial hub of a ranching and mining area. In the 19th century Las Vegas was a watering place for travelers to South Californ
