题目

某溶液中含有Ba2+、Ag+、Cu2+三种离子，现用①NaOH溶液、②K2SO4溶液、③盐酸将这三种离子逐一沉淀并加以分离，则加入试剂顺序正确的是（   ） A . ①②③ B . ③②① C . ②③① D . ②①③ 答案：BMillie is writing down what her family has for dinner in a typical week. Read the table. Complete the sentences with "always","usually","often", "sometimes","seldom", and "never", according to the picture above. 1 We ______have fish for dinner. 2 We______eat rice for dinner 3 We_____eat vegetables for dinner. 4 We_____have soup for dinner. 5 We_____have hamburgers for dinner. 6 We_____eat chicken for dinner.