题目

就植树节这一天的植树活动写一篇简短的日记。（不少于60个单词，注意格式。） 提示: 1. 穿旧衣服；2. 早餐后乘车去南山；3. 挖坑，种树，浇水，每人种树三棵；4. 12点结束；5. 感想     答案：Monday March 12th, 2005                                 fine     Today is Tree Planting Day. After breakfast we went to the South Hill to planting trees by bus. We were all in old clothes and worked very hard. Some dug holes, some put trees in them and others watered them. Each of us planted three young trees. When we finished our work, it was already twelve o’分析以下几个热化学方程式，表示固态碳和气态氢气燃烧时燃烧热的是A．C（s）＋1/2O2（g）===CO(g) ΔH ="-110.5" kJ/molB．C（s）＋O2（g）===CO2(g) ΔH ="-393.5" kJ/molC．2H2(g)＋O2(g)===2H2O(l)ΔH ="-571.6" kJ/molD．H2(g)＋1/2O2(g)===H2O(g)ΔH ="-241.8" kJ/mol