题目

（四川省绵阳中学2010届高三高考模拟C篇）     Australians have been warned they face a life or death decision over their water—drink recycled sewage(污水)or die．    With the drought(干旱)continuing，the country is set to be forced to use purified(净化的)waste water for drinking．even though there is great opposition to the measure．     Queensland has become the first state to introduce tile policy after a warning from its premier． “I think in the end，because of the drought，all of Australia is going to end up drinking recycled purified water既是我国地势第二、三级阶梯界线,又是农耕区与畜牧区界线的山脉是( )A.太行山B.长白山C.巫山D.大兴安岭