题目

阅读理解When almost everyone has a mobilephone, why are more than half of Australian homes still paying for a landline (座机)These days you'd be hard pressed tofind anyone in Australia over the age of 15 who doesn't own a mobile phone. Infact plenty of younger kids have one in their pocket. Practically everyone canmake and receive calls anywhere, anytime.Still, 55 percent of Australians have alandline phone at home and only just over a quarter （29%） rely only on their smartphones, according to a survey （调查）.Of those Australians who still have a landline, a third concede that 划分东、西半球的分界线是（ ）A.0°和180° B.赤道C.20°W和160°E D.20°E和160°W