题目

Poorer children would be offered the chance to attend lessons on Saturday to help catch up with their middle class peers (同龄人), the shadow schools secretary, Michael Gove, said today. The Conservatives would give English state schools the freedom to choose to have longer teaching hours and extra classes at the weekend, he told the Association of Teachers and Lecturers’ annual conference. Gove said the move would help to close the achievement gap with richer children whose parents could afford extras such as tutoring and music lessons. He told delegates (代表) in Manchester: 下列各组溶液，相互能发生反应的是（　　）A．碳酸钾和硝酸钡B．硝酸钡和盐酸C．氢氧化钠和碳酸钾D．硫酸钠和碳酸钾