问题 选择题

食品与人的健康密切相关.下列做法不会危害人体健康的是(  )

A.为补充铁提倡使用加铁酱油

B.为了延长食品的保质期,加入过量的防腐剂

C.常吃加入明矾而炸制的油条

D.为保持肉制品鲜美,在香肠中加过量的亚硝酸钠

答案

A、铁是血红蛋白的成分,适当的补充铁元素,可以防止缺铁性贫血,不会危害人体健康;故A正确;

B、防腐剂大多数对人体健康不利,加入过量的防腐剂会危害人体健康;故B错误;

C、明矾中含有铝元素,会使人的摄铝量增加,从而影响脑细胞功能,导致记忆力下降,思维能力迟钝,常吃加入明矾而炸制的油条会危害人体健康;故C错误;

D、亚硝酸钠有毒,如果在香肠中加过量的亚硝酸钠会危害人体健康;故D错误.

故选A

材料分析题

2009年水污染事件:因韶关冶炼厂设备检修期间超标排放含镉废水,导致北江韶关段镉严重超标,严重威胁下游饮用水源安全;山东胶州村庄因企业违法排污,水源受污染,五年20余人患癌症,同时大多数村民家的井水都因含很多杂质而无法饮用;由于自来水水源受到化工污染,江苏省盐城市区发生大范围断水,至少20万居民的生活受到影响。

(1)请你结合材料多角度分析水污染事件频繁发生的原因。

                                                                                                                                                                

                                                                                                                                                              

(2)为减少水污染事件的频繁发生,请你提出几条可行性建议。

                                                                                                                                                               

                                                                                                                                                               

(3)有人认为,要加快经济发展就必然会破坏环境,注重了环境保护就会影响当地经济的发展。这种观点对吗?为什么?

                                                                                                                                                              

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                              

单项选择题