首页
登录
职称英语
The dark smoke that comes out of stacks or from a burning dump contains tiny
The dark smoke that comes out of stacks or from a burning dump contains tiny
游客
2023-12-19
44
管理
问题
The dark smoke that comes out of stacks or from a burning dump contains tiny bits of solid or liquid matter. The smoke also contains many gases, most of which cannot be seen. Altogether, they make up the serious problems of air pollution. In so many places it keeps us from seeing the sun, irritates our eyes, causes us to cough, and makes us ill.
Air pollution can spread from city to city. It even spreads from one country to another. Some northern European countries have had "black snow" from pollutants that have traveled through the air from other countries and have fallen with the snow. So air pollution is really a global problem.
Air pollution can kill babies, older people ,and those who have respiratory(呼吸道的) diseases. In London, in 1952, four thousand people died in one week as a result of a serious air-pollution episode. In 1948, in the small town of Donora, Pennsylvania, twenty people died in a four-day period of bad air pollution.
At levels often found in cities, air pollution increases the risks of certain lung diseases, such as emphysema, bronchitis, and asthma. Of course, smoking and other factors help to cause these illnesses, too, but these cases have increased greatly during recent years as air pollution has become worse. Air pollution can cause both airplane and auto accidents because it cuts down visibility. There are other possible health dangers from air pollution that we don’t know much about. For example, scientists are trying to find out whether chemicals that reach us from the air may cause changes in our cells.
These changes might cause babies to be born with serious birth defects. Scientists are trying to learn how all the many chemicals we are apt to take into our bodies from air, water, food, and even medicines act together to affect our health and the way our bodies work. That is another reason why it is so important to begin to control pollution now instead of waiting until we learn all the answers.
Air pollution costs us a lot of money. It soils and corrodes our buildings. It damages farm crops and forests. It has a destructive effect on our works of art. The cost of all this damage to our government is astronomical. It would be much more worthwhile, both for us and for the environment, to spend our tax dollars on air pollution control. [br] Air pollution causes airplane accidents because ______.
选项
A、pilots become iii
B、visibility is reduced
C、engines fail.
D、the air is too hot
答案
D
解析
根据第三段中的第三句cut down visibility可以推知为B。
转载请注明原文地址:https://tihaiku.com/zcyy/3286258.html
相关试题推荐
InTG,thestructurethatcontainsalltheunitandrelationshipsthatareneces
The100-page-longleafletthemanspeakergotatOsloAirportcontains______.[
Whichofthefollowingcontainsphonemiccontrast?A、peat,peelB、pea,peeC、pee,
Whichofthefollowingwordscontainstwomorphemes?A、Physic.B、International.C
InT.G,thestructurethatcontainsalltheunitandrelationshipsthatarenece
Whichofthefollowingcontainsphonemiccontrast?A、peat,peelB、pea,peeC、pee,
Thedarksmokethatcomesoutofstacksorfromaburningdumpcontainstiny
TheoriginalAmericanflagcontains13horizontalstripesand13whitestarsarr
NewEnglandcontains______states.A、5B、6C、7D、8B
TheBibleitselfcontainsatotalof66booksandisdividedintotwoparts,
随机试题
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletopu
创伤性脂肪栓塞时,直径<20μm的栓子最常栓塞的部位是()A.脑 B.肺
总平面设计是指总图运输设计和总平面配置,下列内容中均属于总平面设计中影响工程造价
编制安全措施计划的依据有()。A、国家发布的有关职业健康安全政策、法规和标准
护士长在运用ABC时间管理方法时,确定ABC顺序的依据为A.工作优先顺序 B.
患者,女性,62岁,半年来频繁发作心前区不适,2小时前再次发作,自行含服硝酸甘油
关于我国政府采购制度规范范围的说法,正确的是()。A.空间范围仅限于境内的政府
关于投标文件签署,下列描述正确的是()。A、投标函及投标函附录、已标价工程量清单
下列不属于招标采购项目目标的特点的是( )。A.多重性 B.相关性 C.层
下列属于桥面防水施工混凝土基层质量现场检测主控项目的是()。A.含水率 B.
最新回复
(
0
)