题型:问答题 —_________ my alarm clock?—_________ on the bed. [ ]A. Where , ItB. Where's , It's C. Where are , They'reD. Where , It's 查看答案
题型:问答题 已知一定条件下硫酸铵分解反应为 4(NH4)2SO4="=" N2↑ +6NH3 ↑+3SO2 ↑+SO3 ↑+7H2O。将硫酸铵分解反应后的混合气体通入氯化钡溶液中,下列判断正确的是( ) A.得到的沉淀是BaSO4B.得到的沉淀是BaSO4和BaSO3C.一定无BaSO3生成D.无沉淀生成 查看答案