题目

The story happened during the Second World War. An old man lived in a small town of Germany. He had three sons and they all worked in the same factory where he had worked. After the war had begun, his sons were all made to join the army one after another and they all died in the fights. The old man was very sad. He didn’t have enough food and was often hungry. And nobody helped him and he didn’t know how to go on living. It was a very cold winter night. The old man couldn’t go to sleep. He had been hungry for two days and it was so cold in his room that ice could be seen. He had t2006年8月24日上海市人民政府令第62号：《上海市地面沉降防治管理办法》已经2006年5月8日市政府第105次常务会议通过，现予公布，自2006年10月1日起施行。明确指出为了防治地面沉降，避免和减轻地面沉降造成的损失，维护人民生命和财产安全，促进经济和社会可持续发展，根据《地质灾害防治条例》和有关法规、规章的规定，结合上海市实际情况，特制定本办法。根据以上材料，完成下面问题。1.造成上海地面沉降的原因主要是A.臭氧层遭到破坏B.南水北调C.长江上游修建水库D.过度抽取地下水2.下列哪些措施可以有效抑制地面的沉降①减少地下水的开采量              ②人工回灌地下水         ③调整产业结构，发展重化工业      ④开发浦东A.①②B.②③C.③④D.①④