过去五年，广东省一般预算支出中教育支出累计达到3397亿元，年均增长23.77%；省级教育支出累计达到414亿元，年均增长25.91%。我省不断加大教育投入，因为教育是（   ）
① 民族振兴和社会进步的基石           ② 发展科技和培养人才的基础
③ 发展先进文化的中心环节和基础工程   ④ 开拓、带动、提高先进生产力的重要力量 

    Hi everyone! Good news. A book sale.____will people drive cars in space? Will you meet traffic ____? You'll get answers from our books. Are ____ interesting for you? They can do heavy work. You ____enjoy short working hours. We've got some storybooks about them. What's the best way to buy products at very good prices? Our books will tell you something about online ____? 

    Welcome to the playground this Saturday.

    Have a nice day!

法律是社会行为规范。与道德、纪律等规则相比较，法律具有三个最为显著的特征。法律是（    ）

①由国家制定或认可的                               ②靠国家强制力保证实施的

③对全体社会成员具有普遍约束力的       ④靠社会舆论、习惯和信念来维持的

下列反应中属于氧化反应但不属于化合反应是 (   )