C.was enforced by law.
D.was introduced.
正确答案:C
解析:美国法律强制使用无铅汽油后,世界范围的铅金属积累量明显减少了。第一段最后一句话支持这一说法,注意,文中的mandated与C选项中的enforced意思相同,都是强制的意思。
3.How did scientists discover the source of lead pollution in Greenland
A.By analyzing the data published in journals like Nature and Ambio.
B.By comparing the chemical compositions of leaded gasoline used in various countries.
C.By observing the lead accumulations in different parts of the arctic area.
D.By studying the chemical elements of soil and snow in Northeastern America.
正确答案:B
解析:问题问的是:科学家是怎样发现格陵兰的铅污染来源的?第三段提到科学家发现美国汽油中的各种铅金属比重不同于欧洲,亚洲和加拿大的。通过比较这些铅比的不同判断出格陵兰雪中铅污染主要来自美国。因此B正确。
4.The authors of the Ambio study have found that
A.forests get rid of lead pollution faster than expected.
B.lead deposits are widely distributed in the forests of the US.
C.lead accumulations in forests are more difficult to deal with.
【职称英语考试综合类阅读理解试题(3)】相关文章:
最新
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01