题目

Attempt a guess at the following question: In the English-speaking world, which country has the least affordable homes? You are wrong if you guessed the US, even with the housing bubble （气泡） and main sadness． Nor is it the UK, where prices have risen because demand is far from supply． According to a recent survey of 227 cities around the globe, you must go south of the equator （赤道） to Australia to find the priciest homes． The report measured a city’s housing market along the following guidelines． An “affordable” home required three times or less of the average fam西南区连接我国东西铁路大动脉的对外通道是……………………………………（　） A．宝成线      B．成昆线 　　     C．襄渝线   　　    D．南昆线