题目

We are going to _________ under the tree. A . camping B . camps C . camp 答案：C一定条件下，下列反应中水蒸气含量随反应时间的变化趋势符合下图的是（    ） A．CO2(g)＋2NH3(g)CO(NH2)2(s)＋H2O(g)；   △H＜0 B．CO2(g)＋H2(g)CO(g)＋H2O(g)；   △H＞0 C．CH3CH2OH (g)CH2=CH2(g)＋H2O(g)；   △H＞0 D．2C6H5CH2CH3(g)＋O2(g)2 C6H5CH=CH2(g)＋2H2O(g)；   △H＜0