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
69
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]Interviewer:GoodmorningMr.Pitt.Dositdown.Firstofall,Mr
Usually,therearetworeasonstopursuescientificknowledge:forthesake
[originaltext]W:Hello.CanItakeyourorder?M:Yes.I’dlikealargepeppero
膀胱癌的组织学类型可以是()。A.腺癌 B.鳞癌 C.移行细胞癌 D.
下列有关冠心病危险因素的说法不正确的是A.危险因素是指个体固有的生理、心理因素或
下列项目中,不能够确认为无形资产的是()。A.通过购买方式取得的土地使用权
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
某固定节拍流水施工,基础工程划分4个施工过程(挖基槽、作垫层、混凝土浇筑、回填土
16岁女孩,左小腿上段肿胀疼痛半年,近1个月来肿胀明显,夜间痛明显.查体:左胫骨
根据《标准化法》,下列标准中,不能制定为强制性标准的有()。2018真题A、行业
最新回复
(
0
)