题型:问答题 简答题 The new book has just ______. Let’s go and buy it. A.come out B.come downC.come on D.come over 查看答案
题型:问答题 简答题 下列气态氢化物的稳定性按逐渐减弱顺序排列的是:( )A.HI、HBr、HCl、HFB.HCl、H2S、PH3、SiH4C.H2O、H2S、HCl、HBrD.HF、H2O、PH3、NH3 查看答案