图16为“我国某地区主要生态环境问题分布图”，甲、乙图例各代表_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题综合

图16为“我国某地区主要生态环境问题分布图”，甲、乙图例各代表一类生态环境问题。读图回答下列问题。

(1) 乙图例代表的生态环境问题是 ( ) (2分)

A．森林锐减 B．水土流失 C土地荒漠化 D．湿地减少

(2) 分析图中A地乙图例所代表的生态环境问题产生的主要原因，简述该生态环境问题对长江中下游地区造成的不利影响。(8分)

答案

(1) B(2分)

(2) A地气候湿润、降水丰富；多石灰岩、植被覆盖率低；地势崎岖，坡度较陡；植被

的破坏(6分)。河湖淤积，洪涝加剧(2分)。

本题考查我国局部的生态环境问题。

第1题，图示乙区域为我国西南地区长江中上游的一部分。该区域降水丰沛，地势崎岖，落差较大，而人类活动对该区的植被破坏又较为严重，因此极易引起水土流失问题。

第2题，西南地区水土流失产生的原因主要从自然原因：气候、地形、植被和人为原因：植被破坏严重等方面分析；河流上游的水土流失，主要造成河流下游泥沙淤积，而导致河流泄洪能力下降，洪涝灾害多发；

选择题

在三省六部制中，下辖六部，负责政令的执行的是：[ ]

A、尚书省

B、中书省

C、门下省

D、内史省

完形填空

The other day I was talking to a stranger on the bus; he told me that he had a good   36  in Chicago and he wondered if, by any chance, I   37  to know him . For a moment, I thought he might be   38  ,but I could tell from the expression on his face that he was not. He was   39 . I felt like saying that it was ridiculous (可笑的) to   40  that out of all the millions of people in Chicago I could possibly have ever bumped into his friend. But,   41 , I just smiled and reminded him that Chicago was a very   42 city. He nodded, and I thought he was going to be content to drop the subject and talk about something else. But I was wrong. He was silent for a few minutes, and then he   43  to tell me all about his friend.
His friend’s main   44  in life seemed to be tennis. He was an excellent tennis player , and he   45   had his own tennis court. There were a lot of people with swimming   46 , yet there were only two people with private tennis court; his friend in Chicago was one of them. I told him that I knew several   47  like that, including my brother, who was a doctor in California. He   48  that maybe there were more private courts in the country than he   49  but he did not know of any others. Then he asked me   50  my brother lived in California. When I said Sacramento, he said that was a coincidence   51  his Chicago friend spent the summer in Sacramento last year and he lived next door to a   52  who had a tennis court in his backyard. I said I felt that really was a coincidence (巧合) because my next-door neighbour had gone to Sacramento last summer and had   53  the house next to my brother’s house. For a moment, we stared at each other, but we did not say anything.
“Would your friend’s name happen to be Roland Kirkwood?” I asked finally. He   54  and said, “Yes. Would your brother’s name happen to be Dr Rey Hunter?” It was my   55  to laugh. “Yes,” I replied.

D．disappointed

B．interesting

小题12:A. people B. players C strangers D. friends