当前位置: 首页 >自学考试 > 考点解析 > 公共课 >

自考《英语(二)》真题练习:完成句子题(8.24)

分享

来源:猎学网2017-08-29 11:15:37

单选题

[完成句子]Heavy metals are persistent; they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up and rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer and are also known to cause poisoning.

Industrially contaminated sites usually require a thorough clean-up due to __________.

A、the persistence of heavy metals

B、industrially polluted soils

C、naturally polluted soils

D、rock and soil chemistry

正确答案:A

答案解析:本段提到:受到污染的土壤含有重金属,而且重金属很稳定,不容易降解,所以要对重金属进行彻底的清除。答案选择A。

查看专家点评以往试题可进入“每日一练——免费在线测试系统”>>

分享到: 来源:猎学网阅读:
w
  • 客服
  • QQ
  • 求学登记
  • 活动
  • 返回顶部