黄土高原人地矛盾尖锐，关键问题在于（ ）
A．经济发展速度过快导致资源开采过多
B．工业污染日益严重
C．工业结构不合理导致环境破坏
D．人口增长过快过多导致生态、经济恶性循环
黄土高原地区人口增长过快，加上特殊的高原地貌，千沟万壑，自然环境比较差，山地环境多，平原少，可耕土地比较少，出现了过度开垦现象，造成水土流失，导致生态、经济恶性循环．
故选：D．
根据短文内容，将下面A－E五个句子分别填入文中空缺处，使补全后的短文意思通顺，结构完整。（10分）  Mr. Webster manages a bar in our town. Its name it The White Horse, for a picture of a white horse was once hung on the wall. 小题1: but in the past things were quite different. At that time, Mr. Webster was much worried about his bar. One day a friend of his came, looked around and said, “Take down the picture of the white horse and change it for a picture of a black one.” “ 小题2: ” Mr. Webster said. “Yes, but just do it.” His friend said and went out of the bar. Mr. Webster went to an artist and said, “ 小题3: ” The next day a picture of a black horse appeared on the wall. Soon after the door opened, a man came in and shouted, “ 小题4: The picture on the wall is different from the name.” Then he sat down and drank something. 小题5: and the another and another. A lot of people came in and said, “The picture on your wall is wrong.” But they all stopped and drank in Mr. Webster’s bar. From then on, Mr. Webster was happy again.
|