精英家教网 > 高中地理 > 题目详情

【题目】下表为2007年气象卫星监测的我国西南三省林区火灾次数统计表。读表回答下列问题。

(单位:次)

1月

2月

3月

4月

5月

6月

7月

8月

9月

10月

11月

12月

贵州

21

35

54

5

0

0

0

0

0

0

36

8

四川

23

7

26

8

0

0

0

0

0

0

0

3

云南

25

104

534

155

19

0

0

0

0

0

0

6

1说明西南三省林区火灾发生的时间分布特征,并分析其原因。

2请从水土保持的角度指出森林火灾对当地造成的危害。

【答案】

1多发生在冬季和春季 正值西南地区干季,晴天多,降水少。

2植被破坏导致地表侵蚀加剧,森林涵养水源功能降低,可能引发山洪、泥石流、滑坡等次生灾害。

【解析】

试题分析:

1根据西南三省火灾次数统计表,西南三省林区火灾多发生在冬季和春季。该时期正值西南地区干季,晴天多,降水少。林区的枯枝落叶多,易引发火灾。

2森林火灾造成植被破坏,导致地表侵蚀加剧。森林破坏,导致涵养水源功能降低,可能引发山洪、泥石流、滑坡等次生灾害。

练习册系列答案
相关习题

科目:高中地理 来源: 题型:

【题目】在太行山南段东麓相邻的两条间歇性河流上分别建有甲、乙水库,它们的汇水面积大体相等。2009年雨季,乙水库入库水量912万立方米,甲水库却几乎没有入库水量。据此完成下面小题。

1甲、乙两水库上游流域

A. 河流以地下水补给为主 B. 自然植被为针阔叶混交林

C. 降水集中于7、8月份 D. 位于半干旱区

22009年雨季,甲水库无入库水量是因为其流域

A. 几乎没有降水 B. 植被截留降水 C. 降水大量下渗 D. 人工拦截径流

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】阅读理解。

El Nifio, a Spanish term for “the Christ child”, was named by South American fisherman who noticed that the global weather pattern, which happens every two to seven years, reduced the amount of fishes caught around Christmas. El Nifio sees warm water, collected over several years in the western Pacific, flow back eastwards when winds that normally blow westwards weaken, or sometimes the other way round.

The weather effects both good and bad, are felt in many places. Rich countries gain more from powerful Nifio, on balance, than they lose. A study found that a strong Nifio in 1997 helped American’s economy grow by 15 billion, partly because of better agricultural harvest, farmers in the Midwest gained from extra rain. The total rise in agricultural in rich countries in growth than the fall in poor ones.

But in Indonesia extremely dry forests are in flames. A multi-year drought (干旱)in south-east Brazil is becoming worse. Though heavy rains brought about by El Nino may relieve the drought in California, they are likely to cause surface flooding and other disasters.

The most recent powerful Nino, in 1997-98, killed around 21,000 people and caused damage worth $36 billion around the globe. But such Ninos come with months of warning, and so much is known about how they happen that governments can prepare. According to the Overseas Development Institute (ODI), however, just 12% of disaster-relief funding in the past two decades has gone on reducing risks in advance, rather than recovery and rebuilding afterwards. This is despite evidence that a dollar spent on risk-reduction saves at least two on reconstruction.

Simple improvements to infrastructure (基础设施)can reduce the spread of disease. Better sewers (下水道)make it less likely that heavy rain is followed by an outbreak of the disease of bad stomach. Stronger bridges mean villages are less likely to be left without food and medicine after floods. According to a paper in 2011 by Mr Hsiang and co-authors, civil conflict is related to El Nino’s harmful effects—and the poorer the country, the stronger the link. Though the relationship may not be causal, helping divided communities to prepare for disasters would at least reduce the risk that those disasters are followed by killing and wounding people. Since the poorest are least likely to make up for their losses from disasters linked to El Nino, reducing their losses needs to be the priority.

【1】What can we learn about El Nino in Paragraph 1?

A.It is named after a South American fisherman.

B.It takes place almost every year all over the world.

C.It forces fishermen to stop catching fish around Christmas.

D.It sees the changes of water flow direction in the ocean.

【2】What may El Ninos bring about to the countries affected?

A.Agricultural harvests in rich countries fall.

B.Droughts become more harmful than floods.

C.Rich countries’ gains are greater than their losses.

D.Poor countries suffer less from droughts economically.

【3】The data provided by ODI in Paragraph 4 suggest that_________.

A.more investment should go to risk reduction

B. governments of poor countries need more aid

C. victims of El Nino deserve more compensation

D. recovery and reconstruction should come first

【4】What is the author’s purpose in writing the passage?

A. To introduce El Nino and its origin.

B. To explain the consequences of El Nino.

C. To show ways of fighting against El Nino.

D.To urge people to prepare for El Nino.

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】十八届五中全会决定全面实施一对夫妇可生育两个孩子政策,简称全面二孩。这是继 单独二孩政策之后的又一次人口政策调整。完成下列问题。

【1】全面二孩政策的实施后,短期内可能

A.缓解劳动力短缺局面 B.降低家庭养老负担

C.加重毕业生就业压力 D.影响劳动力职业构成

【2】单独二孩政策的实施并没有预期的新生人口增长,其原因主要有

生育观念转变

抚养成本上升

医疗卫生条件改进

女性人口受教育程度提高

A.①②③ B.②③④ C.①②④ D.①③④

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】《桃花源》记中描述:缘溪行,忘路之远近。忽逢桃花林,……林尽水源,便得一山,山有小口,仿佛有光,便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田美池桑竹之属。据此回答下列各题。

【1】桃花源的天然植被最可能是

A温带草原 B温带落叶阔叶林

C亚热带常绿阔叶林 D热带雨林

【2】桃花源溪流

A1、2月为枯水期 B结冰期较长

C无地下水补给 D无明显汛期

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】某地农民从优化产业结构入手,眼睛盯着城里人的餐桌找市场,变“咱种啥他吃啥”为“他吃啥咱种啥”,既丰富了城里人的菜篮子,又大大提高了农民的收入。据此完成下列小题。

【1】该地决定农业生产的类型和规模的主要因素是

A.交通运输 B.市场需求

C.国家政策和措施 D.自然环境的特殊性

【2】当地农民为了避免蔬菜和水果受到各种污染,并保护生态环境,生产中可采取的有效措施是

采用无土栽培(水培法) 使用绿肥等有机肥

使用高效化肥   使用农药防治虫害 采用生物防治害虫

A.①③④ B.①③⑤ C.①②⑤ D.②③⑤

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】北京时间1215435分,嫦娥三号着陆器与巡视器分离,玉兔号巡视器顺利驶抵月球表面,中国第一次在月球留下足迹。据此回答下列问题。

1英国伦敦(中时区)的华侨观看玉兔号,驶抵月球表面儿的直播的时间是当地时间(

A. 151235B. 141235

C. 152035D. 142035

2玉兔号驶抵月球表面时下列地区白昼最长的是(

A. 大连 B. 北京 C. 上海 D. 深圳

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】提起菠萝蜜、香蕉等这些热带水果,大家可能认为这些热带水果只有在三亚、西双版纳等热带地区才能生长,其实这些热带植物在拉萨早已引进试种成功了,在拉萨,中空玻璃光热连栋智能温室内共种植了60多种热带植物、30多种花卉和10多种蔬菜。

【1】青藏高原上大棚种植改善的是当地

A.热量条件 B.光照条件

C.水分条件 D.土壤条件

【2】拉萨种植西瓜后发现,直接铺在地上生长的西瓜长不好,将西瓜藤蔓架空,西瓜挂着才能结果,其中原因

A.可以减少叶子对西瓜的遮掩,增强光照,促进光合作用

B.可以充分利用立体空间,节省土地、节省大棚面积,减少农业投入

C.大棚内的地面温度比空气温度低,不利于西瓜的发育成熟

D.土壤干燥,直接在地上,容易使西瓜的水分蒸发

查看答案和解析>>

科目:高中地理 来源: 题型:

【题目】我国常住人口城镇化率已达到54%,但户籍人口城镇化率仅为36%。这意味着两亿多进城农民工因户籍限制等因素成了身在城市却难以享受市民待遇的特殊两栖群体。据此完成下列各题。

【1】两栖群体产生的原因是

A农村出现大量剩余劳动力

B城乡经济发展的差距

C产业转移的影响

D交通条件的改善

【2】缩小两个城镇化率差距的最有效措施是

A有序放开城市落户限制

B解决农民工子女教育问题

C保障两栖群体的收入

D拓宽住房保障渠道

查看答案和解析>>

同步练习册答案