“宪法规定我们的国家要建立社会主义，这当然不是说社会主义社会已经是现成的东西，也不是说我们可以坐着等到它来到。”由此可知（    ）

下图为2000—2009年我国中西部地区四种制造业集聚份额比重统计，图示时段内

完型填空

My name is Jenny. I am 12 years old. I am1School. I have2ID card. The number is 1426132. Look! This is 3 watch. It is very good. Oh, what are these? Are they books? No, they aren’t. They are notebooks. I found4 in the school library. A girl's name is on the5. They're Linda's.

下列变化中，属于化学变化的是（　　）