问题
单项选择题
监测站对某河段监测结果表明，水中铬超过卫生标准若干倍，在该河段上游有若干工厂，最有可能的污染源是
A．制革厂
B．仪表厂
C．炼油厂
D．电镀厂
E．造纸厂
答案
参考答案：D
解析：电镀厂的主要工艺是镀铬，是含铬废水的主要来源。有些制革厂的工艺过程中也使用铬盐，也会排出含铬废水。但通常不如电镀厂污染严重。
搜题请搜索小程序“爱下问搜题”
监测站对某河段监测结果表明，水中铬超过卫生标准若干倍，在该河段上游有若干工厂，最有可能的污染源是
A．制革厂
B．仪表厂
C．炼油厂
D．电镀厂
E．造纸厂
参考答案：D
解析：电镀厂的主要工艺是镀铬，是含铬废水的主要来源。有些制革厂的工艺过程中也使用铬盐，也会排出含铬废水。但通常不如电镀厂污染严重。
| 完形填空。 | ||||
| KFC used to be very popular. Many people waited in a long 1 to buy food there. But these days, fewer people eat there 2 it's reported that some foods are dangerous. The 3 comes from Sudan l. It can make people more likely get cancer. So far, Sudan l has been found to be in five of KFC's foods. Sudan l is a red dye (染料). People use it to colour oils, but it should never 4 make food. Last week, health officials asked KFC to stop selling its food 5 Sudan l. Only after they pass inspection can they sell it again. 6 you ate some of the five foods last week, don't worry too much. The chance of getting cancer is very 7 as only a little is used in foods. | ||||
|