题目

密闭容器中一定量混合气体发生反应：xA(g)＋yB(g)zC(g)，达到平衡时，测得A的浓度为0.5 mol/L，温度不变，将容器的体积缩小为原来的一半，再达到平衡，测得A的浓度为0.9 mol/L。下列有关判断正确的是                                        （    ）                                       A．x＋y<z                                B．平衡向逆反应方向移动     C．C的体积分数降低           Rewrite the following sentences as required（据所给要求，改写下列句子。每空格限填一词）【1】Kitty had a headache this morning.（改为一般疑问句）__________ Kitty __________ a headache this morning？【2】She has been working out for an hour.（对画线部分提问）__________ __________ has she been working out？【3】They would choose a day without rain. The wood for the fire would not be wet.（两句合并成一句）_________________________________________________________【4】We aren’t late for school any longer.（保持原句意思不变）We’re __________ __________ late for school.【5】He speaks not only English but also French.（保持原句意思不变）He speaks French as __________ English.【6】You must take the clothes away from the fire.（改为被动句）The clothes __________ __________ __________ away from the fire.【7】like, breakfast, would, bread, for, you, some（？）（连词成句）_______________________________________________