题型:名词解释 — Is this your bedroom?— _________________[ ]A. Yes, it is.B. No, she isn't. C. No, they aren't. 查看答案
题型:名词解释 下列离子可在同一溶液中大量共存,形成无色溶液的是( )A.K+、OH-、Mg2+、Cl-B.H+、Na+、NO3-、SO42-C.Ba2+、Cu2+、NO3-、SO42﹣D.Ba2+、NO3-、OH-、H+ 查看答案