At least 10 million hectares of cultivated（耕作）land in China are polluted, which makes a grave threat to the country’s food safety, the Xinhua News Agency reported on Friday.
The polluted land，which is mostly in economically developed areas，accounts for one-tenth of the country’s total arable（可耕种的）land，according to an inplete survey by the State Environmental Protection Administration，China’s top environment watchdog.
Pollution on cultivated land threatens the environment，food safety and the sustainable development of agriculture，the administration said.
Because of continual，too much use of chemical fertilizer, pesticide and agricultural plastic sheeting, as well as irrigation using polluted water, a large amount of contaminants（污染物）remain in the cultivated land.
The contaminants affect the soil’s ecological structure and function，leading to decreased soil productivity, lower crop yield（产量），and lower quality of agricultural products-
It also leads to worse water quality in rural areas.
Less than 9 per cent of drinkable water passed checks for bacteria in243 rural water supply stations across the county.
Another survey, which took samples of drinking water and groundwater an 69 small towns。 in Beijing, Tianjin and Hebei Province of North，China, showed that more than half of the water contains too much nitrate（硝酸盐），which may cause diabetes（糖尿病）and damage the kidney.
The administration estimated at least 1 90 million farmers are drinking water that contains harmful substances.
Many villagers drink unfiltered water taken from shallow water wells or water cellars， which are reported to have poor sanitary conditions·
【小题1】The author writes the passage to . A．1et the readers examine their mistakesB．present the readers a new ideaC．e up with a solution to ending farmland pollutionD．inform the readers of the importance of fighting farmland pollution【小题2】The underlined word “grave” in Paragraph 1 probably meansA．seriousB．certainC．bigD．terrible【小题3】Pollution on cultivated land leads to the following outes EXCEPT . A．a threat to China’s food safetyB．worse water quality in rural areasC．a variety of diseasesD．the sustainable development of agricultureD
网友回答
(答案→)D
解析：本文主要讲述的就是中国的土壤污染问题，以及土壤污染给人们带来的危害。
【小题1】D 主旨大意题。根据文章第一段At least 10 million hectares of cultivated（耕作）land in China are polluted, which makes a grave threat to the country’s food safety,说明现在的土壤污染的严重性，故D正确。
【小题2】A 推理题。根据本句At least 10 million hectares of cultivated（耕作）land in China are polluted, which makes a grave threat to the country’s food safety,说明很多的耕地受到了污染，对我国的食品安全是一个非常大的威胁，该词应该吃严重的，故A正确。
【小题3】D 细节题。根据文章第三段和第七段too much nitrate（硝酸盐），which may cause diabetes（糖尿病）and damage the kidney. Another survey, which took samples of drinking water and groundwater an 69 small towns。Pollution on cultivated land threatens the environment，food safety and the sustainable development of agriculture，the administration said. ABC三项都是文章中提及的污染问题，只有D项没有涉及，故D符合题意。