首页
登录
职称英语
[originaltext] In urban areas, car produces thousands of tones of lead in the
[originaltext] In urban areas, car produces thousands of tones of lead in the
游客
2023-12-23
32
管理
问题
In urban areas, car produces thousands of tones of lead in their exhaust fumes. In some large cities, the amount of lead in the air and soil is more than a thousand times than the natural level.
For instance, in Singapore lead can affect the children in many ways. The most obvious way is through the exhaust fumes of cars. This means that people who live near busy roads, and especially those on the lower floors are most at risk. It is quite likely that the whole central part of Singapore is polluted by lead from this source. Another source is lead water pipes. Because it flows through the pipes, the water dissolves lead and carries it to household taps. In industrial waste lead is also present. After flowing into the sea, the lead is absorbed by fish, crabs which are eaten by human beings.
Slow poisoning by lead affects the brain too. It makes the victim inactive. He becomes irritable and may even become violent. Lead attack the bones of young people and upsets their nervous system. Victims are far more likely to daydream than other children. And they have great difficulty concentrating on anything for very long. One expert said that she had taught children in the center of city. in the suburbs and in the countryside. She found that rural children who are less affected by lead had a better attitude to their studies and were easier to teach and control.
Only about three decades ago, doctors began to discover just how dangerous lead can be. In many countries, governments are now urged to ban the use of petrol containing lead. In the USA, there were 2700 cases of severe lead poisoning in 1970, but this fell to 300 in 1977 when more areas used lead-free petrol.
Questions:
23.In Singapore children can, be affected by lead in many ways which of the following is NOT mentioned in the talk?
24.Which of the following is not the symptoms when the brain is affected?
25.When did people discover the great danger of lead, according to this talk?
26.How can we prevent the lead pollution?
选项
A、Don’t use any product containing lead.
B、Move out of the urban areas to the countryside.
C、Eat less fish, crabs and vegetables.
D、Stop using the petrol containing lead.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3299269.html
相关试题推荐
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
随机试题
[originaltext]W:Mark,thesedaysweallknowthattimeismoney.Sowhyisyour
Who’spoorinAmerica?That’saquestionhardtoanswer.Hardbecausethere’
Insuchachanging,complexsocietyformerlysimplesolutionstoinformation
Todaywetalkaboutthedifferencebetweenacollegeandauniversity.Colle
以枕右前位分娩时,当胎儿仰伸时,胎儿的双肩径进入A.中骨盆横径 B.骨盆前后径
客户至上的基本要求是()的利益优先。A.客户 B.基金托管人 C.基
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
巨能公司是多家手机制造企业的电池供应商。根据波特的五种竞争力分析理论,下列各项关
胃肠癌病人A、血酸性磷酸酶升高 B、血酸性糖蛋白升高 C、血CEA升高 D
黄体生成素来源于A、下丘脑 B、腺垂体 C、卵巢 D、子宫 E、胎盘
最新回复
(
0
)