人为地往水中加入强氧化剂,迅速氧化有机物,氧化剂消耗量越大,说明水质越污染的指标是 发布时间:2017-02-03 20:28 │ 来源:www.tikuol.com 题型:单项选择题 问题: 人为地往水中加入强氧化剂,迅速氧化有机物,氧化剂消耗量越大,说明水质越污染的指标是A.溶解氧B.化学耗氧量C.生化需氧量D.结合氧E.复氧量
题型:单项选择题 用所给单词的适当形式完成句子。1. More and more _____ (danger) animals need to be protected by us.2. Don't worry. We _____ (support) you when you have the match.3. _____ (recycle) paper to save trees is very important.4. Your house is very old. It should be _____ (pull) down.5. Why are you _____ (wear) a coat in such hot day? 查看答案