题目

安第斯山区平均海拔4 000多米，山体表面景观自下而上呈现出明显的变化，依次是()①热带雨林②低缓山坡的草地和林地③高山冰雪带 ④高山草地 A . ①②③④ B . ①③②④ C . ①②④③ D . ①④②③ 答案：C—Is there any possibility ______ you could pick me up at the airport?—No problem.A. whenB. thatC. whetherD. what