题目

Hardly __________ dead or injured when the disaster hit the area.    A. had the Chinese citizens been reported    B. the Chinese citizens had been reported    C. did the Chinese citizens been reported    D. was the Chinese citizens been reported 答案：A 解析: 略读某区域河流封冻等日数线示意图，回答下列问题．（1）简要分析图中A处等值线向北凸出的原因．（2）说出图中B处河流封冻日数H的取值范围以及该区域河流最主要的补给水源．（3）C地区有大面积的沼泽分布，试分析沼泽的形成原因．（4）近年来我国停止了该地区的农垦项目，试分析这一举措的生态意义．