问题 综合

做大做强优势农产品和优势农业产区,对带动我国农业整体素质提高,形成科学合理的农业生产布局,推进农业现代化具有重大意义。图17是我国部分农产品优势产区布局示意图。读图回答下列问题。(12分)

(1)从自然条件分析:西北地区棉花种植的优势条件是  限制性条件是    。 (2分)

(2)东北和京津沪都是我国牛奶优势产区,东北牛奶产区主导区位条件是     ,京津沪牛奶产区主导区位条件是            。(2分)

(3)东北地区和长江流域都是我国重要粮食产区,分析表3比较两地农业生产的差异。(8分)

 东北地区长江流域
主要粮食作物       (2分)       (1分)
农业地域类型       (1分)       (1分)
优势社会经济条件       (2分)       (1分)

答案

(12分)

(1)光照强;昼夜温差大;沙质土壤(2分)水源缺乏(1分)

(2)饲料丰富 靠近消费市场(2分)

(3)(8分)   

 东北地区长江流域
主要粮食作物小麦、玉米(2分)水稻(1分)
农业地域类型商品谷物农业(1分)季风水田农业(1分)
优势社会经济条件人均耕地广(地广人稀)

机械化程度高(2分)

劳动力丰富(1分)

试卷分析:

小题1:西北地区地处内陆,离海远,故降水少,气候干旱,但光照强,昼夜温差大;而影响农业生产的自然条件主要从气候、地形、土壤、水源等方面分析。

小题2:东北地区草原广阔,故饲料是影响奶牛养殖的主要原因;而京津唐地区经济发达,人口集中,故市场广阔,市场是影响奶牛养殖的主导因素。

小题3:东北地区位于我国北方,纬度较高,热量不足,主要位于中温带,故主要的粮食作物为春小麦和玉米;但地广人稀,商品率高,机械化水平高,故农业生产属于商品谷物农业;而我国长江流域位于南方,光热条件充足,故主要的粮食作物为水稻种植;但人多地少,商品率低,故农业生产属于水稻种植业。丰富的劳动力是本区农业生产的社会经济条件。

点评:本题解题的关键是掌握影响农业布局的主要区位因素和我国区域农业生产的概况。

单项选择题
单项选择题

The use of chemicals in almost all areas of life has become a commonplace phenomenon. There is growing evidence, however, that chemicals in the environment, including pesticides, may contribute to some illnesses. While studies are still being conducted, preliminary conclusions point to the verdict that such chemicals are indeed negatively impacting those humans to whom they are exposed.

Children are especially vulnerable to toxic substances. Pound for pound, they eat, drink and breathe more than adults, all of which exposes them more heavily to those chemicals to which most individuals encounter on a daily basis. Furthermore, their bodies are still in developing stages, exacerbating the negative effects of those chemicals, which negatively impact them.

Of 50 types of pesticides commonly used in American schools, a study conducted by the National Coalition Against the Misuse of Pesticides found that many caused negative reactions in laboratory animals. Such negative effects included kidney and liver damage, cancer, and neurological and reproductive problems.

These implications of these findings are far-reaching. Given the variety of harmful effects attributed to those pesticides tested, one must pause and consider whether it is wise to continue their use in the nation’s schools, where children will be constantly exposed to them. Activists have lobbied for the elimination of such use with a degree of success, and recent findings, if supported by further analysis and confirmation, may help further the cause. A long term solution or alternative, however, remains elusive.

In the short run, however, there may be some measures that can be taken to mitigate the harmful effects of dangerous pesticides. The American Medical Association’s Council on Scientific Affairs concluded in a 1997 report that given the "particular uncertainty.., regarding the long-term health effects of low-dose pesticide exposures," it is "prudent" for adults and children to limit their exposure and to "consider the use of the least toxic chemical pesticides or non-chemical alternatives. \

Children are more likely than adults to suffer the negative effects of pesticides because()

A. children absorb more pesticides than adults, proportionally

B. pesticides are used more in areas with children

C. the pesticides used in schools are more dangerous than other pesticides

D. adults know more about pesticides than children