题型:问答题 简答题 I called Hnnah many times yesterday evening, but I couldn’t get through. Her brother _____on the phone all the time!A.was talkingB.has been talkingC.has talkedD.talked 查看答案
题型:问答题 简答题 在下列横线上写出溶液中溶质的化学式: (1 )高锰酸钾水溶液____________ ,(2 )硫酸铁溶液____________ , (3 )澄清石灰水________________ ,(4 )浓盐酸______________ 。 查看答案