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
33
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、Get angry more easily and even more violent.
B、Be inactive and lack energy.
C、Easily distracted.
D、Tend to have more dream than other children.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3299267.html
相关试题推荐
[originaltext]Themushyremainsofatomatothrownataprominentmemberof
[originaltext]Peoplecanbeaddictedtodifferentthings,e.g.,alcohol,dr
[originaltext]Peoplecanbeaddictedtodifferentthings,e.g.,alcohol,dr
[originaltext]Peoplecanbeaddictedtodifferentthings,e.g.,alcohol,dr
[originaltext]Peoplecanbeaddictedtodifferentthings,e.g.,alcohol,dr
[originaltext]Everyoneknowsaboutunemployment.ButmillionsofworkingAm
[originaltext]Everyoneknowsaboutunemployment.ButmillionsofworkingAm
[originaltext]Everyoneknowsaboutunemployment.ButmillionsofworkingAm
[originaltext]GlacierNationalParkinMontanasharesboundarieswithCanad
[originaltext]GlacierNationalParkinMontanasharesboundarieswithCanad
随机试题
Upuntiltheageof18,Ireadverylittle.I【C1】______myselftowhatwasne
D
A.老蜜B.蜜水C.嫩蜜D.中蜜E.生蜜含多量油质、黏液质的药物制备大蜜丸时使用
甲烷发酵的四阶段理论过程为()。 A产氢产乙酸阶段,水解、发酵阶段,产甲烷
在面试过程中,面试考官可以考察应聘者( )A.相关知识的掌握程度 B.判断、
关于拍卖底价的说法,错误的是()。A:拍卖底价是拍卖前公布的拍卖标的物的评估价
下列对带锯机操纵机构的安全要求中,错误的是()。A.启动按钮应设置在能够确认
关于常用水泥凝结时间和体积安定性的说法,错误的是( )。A.水泥的凝结时间分初
不属于高桩码头沉桩控制的是()。A.偏位控制 B.承载力控制 C.桩的裂损控
实施雷达管制必须有()设备的支持。A.精密进近雷达 B.二次监视雷达 C.
最新回复
(
0
)