在557℃时，密闭容器中进行下列反应CO+H2O（g）CO2+H2。若CO起始浓度为2mol·L-1，水蒸气浓度为3mol·L-1，达到平衡时，测得CO2的浓度为1.2mol·L-1。求CO及H2O的
化学与生活密切相关，生活中的下列做法不合理的是（ ） A．用白醋除热水瓶中的水垢 B．洗洁精可乳化餐具上的油污 C．用氢氧化钠溶液中和酸性土
---- What are you _____, Tom?----- I’m ________ TV programs.A．doing, watchesB．doing, watchingC． do, watchingD．do, watch
补写出下列名句名篇中的空缺部分。(任选四小题)(1)高余冠之岌岌兮， 。芳与泽其杂糅兮，唯昭质其犹未亏。(屈原《离骚
18．默写 （1） ， 。实迷途其未远，觉今是而昨非。 （2） 云销雨霁， 。 ，秋水共
●Geographic ChampionshipAugust 9, 2007 “What historic site was carved from sandstone in about 1200 B.C.? This site includes two huge temples and statues of an ancient ruler.”That’s the questi
Does happiness have a scent? When someone is happy, can you smell it? You can usually tell when someone is happy based on seeing them smile, hearing them laugh or perhaps from receiv
，则
____________.
