题目

下列A~D四组，每组有两个反应，其中两个反应可用同一个离子方程式表示的是（   ）ⅠⅡ A将少量浓氨水滴入Al2(SO4)3溶液将少量Al2(SO4)3溶液滴入浓氨水 B将少量SO2通入Ba（OH）2溶液将过量SO2通入少量Ba（OH）2溶液 C将0.1mol Cl2通入含0.2molFeBr2的溶液中将0.3mol Cl2通入含0.2mol FeBr2溶液 D将过量BaCl2溶液与少量Na2SO4溶液相混合将少量Ba（OH）2溶液与过量MgSO4溶液相混合用所给动词的适当形式填空。1. What a pity (遗憾)! Some students just don’t know how __________(have )fun.2. ---___________ your father ___________ (do) any housework at home? --- No. My mother does it.3. You should practise __________ (read) English every day if you want to learn it well.4.Wendy always ____________ (dress ) up to celebrate Halloween.5．Dad and Mum ____________ ( not be ) busy, so they can watch TV now.