题型:选择题 下列各组离子能够大量共存于同一溶液中的是( )A.CO32-、H+、Na+、Cl-B.Ag+、Cl-、K+、SO42-C.K+、OH-、NH4+、NO3-D.Ca2+、Cl-、Na+、NO3- 查看答案
题型:选择题 It was _____ that caused him to serve dinner an hour later than usual.A.we being lateB.our being lateC.we were too lateD.because we were late 查看答案