poisonous是什么意思

Electronic wastes also contain many poisonous metals.

2015年高考英语江苏卷 阅读理解 阅读B 原文

Even when the machines are recycled and the harmful metals removed, the recycling process often is carried out in poor countries, in practically uncontrolled ways which allow many poisonous substances to escape into the environment.

2015年高考英语江苏卷 阅读理解 阅读B 原文

If she had been aware that the mushroom were poisonous, she would not have picked them for dinner.

2015年高考英语湖北卷 句子填空 原文

Lead poisonous has proved more difficult to deal with.

2016年高考英语北京卷 阅读理解 阅读C 原文