题目

任务型阅读；阅读下面短文，根据短文内容完成句子。  The seasons in Australia are not like ours. When it is winter in China, it is summer there. Australia is a southern country, it is in the south of the world. July and August are the winter months; September, October and November are spring; the summer is in January, February and December; and March, April and May are the autumn months. The north of the country is hotter than the south. A very large part of this country has no rain at all. The east coast has rain all year, and there are no dry months there. The 关于电磁波及其应用，下列说法中正确的是                           （      ） （A）在真空中，无线电波的传播速度大于红外线的传播速度 （B）收音机放进金属薄膜袋内，也能正常收音 （C）电磁波必须依靠介质来传播 （D）电磁波的传播过程是能量传递的过程