题型:填空题 --- What do you think of the dress?--- Wonderful. I don’t think I can find a ________ one.A.goodB.bad C.betterD.worst 查看答案
题型:填空题 已知同温同浓度时①H2CO3比H2S电离度大,②H2S比HCO3-电离度大,则下列反应不正确的是A.Na2CO3+H2S==NaHCO3+NaHSB.Na2S+H2O+CO2==NaHS+NaHCO3C.2NaHCO3+H2S==Na2S+2H2O+2CO2D.NaHS+H2O+CO2==NaHCO3+H2S 查看答案