One day Skygirl went to our classroom with Skyboy. She was very h____. She took a hamburger and a cola w____ her. She wanted to r____, to have some food and drink and t____ to boys and girls in the classroom. She was not happy when she saw the s____ in the classroom. What does the sign mean? It says: "Don't run in the classroom. Don't talk to each other in class. Don't ear or d____ in class. ""I don't want to be in the classroom. Let's f____ away. "The Supergirl said to the Superboy. They came to the Garden City. Garden City is an i____ place for the Superchildren to play.

工业炼铁是在高炉中进行的，高炉炼铁的主要反应是：①2C（焦炭）+O₂（空气）=2CO；②Fe₂O₃+3CO=2Fe+3CO该炼铁工艺中，对焦炭的实际使用量要远远高于按照化学方程式计算所需其主要原因是：（　　）

儿童、青少年正处在身高、体重快速增长的阶段，每天应多吃一些奶、蛋、鱼、肉，这是因为这些食物中含有丰富的（　　）

选择括号内恰当的单词或词组填入空白处，使句意完整、正确。