Water _________(freeze) at the temperature 0°C也许对你来说是个很简单的问题空格里填什么?直接填freeze嘛?还有,for后面的动词是否加ing?好像是的吧!

Ammonium-free water Nitrate-free 请问Ammonium-free water和Nitrate-free Water,RNase,DNase-free是什么意思 carbon dioxide-free water怎么翻译啊. 英语翻译_________ when you are free. Nuclease-Free Water与RNAase-free Water 区别?是否可以相互代替使用? water is set to run it free意思 keep free from water 来自一篇阅读理解 CO2-free triple distilled water是么事意思?RT We should save water.It is very important.< 两句合并1句 >_________ is important _________ _________ save water. Kelly has no _________(free) to do what she likes. the school _______the children _________ free lunch.（提供） 9.Three quarters of the earth _________ water.(discover) Water _________ about seventy persent of the earth,s surface Free free free free