题目

读“中国地形分布略图”，回答下列问题： （1）图中A山脉以南的盆地分布有我国面积最大的沙漠________；B是________山脉，位于我国地势第________级阶梯上． （2）图中D是________山脉，此山脉东侧省区是________省，西侧是________高原，该高原主要的生态问题是________严重． （3）图中E山脉位于________省境内，它是我国地势第二级阶梯和第________级阶梯的分界线之一． （4）图中F是________（山脉），呈东________走向；G是世界最高峰________峰，是________山脉的主My friend Matt and I arrived at the Activity Centre on Friday evening．The accommodation wasn't wonderful, but we had everything we needed(beds, blankets, food), and we were pleased to be out of the city and in the fresh air．On Saturday morning we met the other ten members of our group．Cameron had come along with two friends, Kevin and Simon, while sisters Carole and Lynn had come with Amanda．There were some other members I didn't know．We had come from different places and none of us knew the area．We knew we were going to spend the weekend outdoors, but none of us was sure exactly how．Half of us spent the morning caving while the others went rock-climbing and then we changed at lunchtime．Matt and I went to the caves(岩洞)first．Climbing out was harder than going in, but after a good deal of pushing, we were out at last．Though we were covered with mud, we were pleased and excited by what we'd done．This passage mainly talks about ________．A.the writer's friends at the Activity CenterB.the writer's experience at the Activity CenterC.outdoor sports at the Activity CenterD.how to go rock-climbing and caving