题目

实验室制备Al(OH)3沉淀，最适宜的方法是 A．AlCl3溶液中加入NaOH溶液       B．AlCl3溶液中加入足量氨水 C．NaAlO2溶液中加入浓盐酸       D．Al2O3溶于足量的热水中 答案：BChoose the right words.选择填空-______________ are you going？ - I am going to the Great Wall.-_____________ are they going to school? -They go to school by school bus.-_____________ are you going to the museum? –Tomorrow afternoon.-_____________ are we going to buy? –We are going to buy some fruit.-_____________ is she going with? –She is going to Beijing with her mum.