My name is Kitty. I have a very big and nice room and I have a great school things collection. My brother’s room is near my room. He is Mike. And he has a small sports collection. I have twenty erasers, ten pencils, nine rulers and eight pens in my schoolbag. My brother has two baseballs, four soccer balls and five basketballs under his bed.

将17.6克Fe₂O₃和Cu的混合物溶解于足量的稀盐酸中，再加铁粉9.8克，待铁粉溶解后，溶液中无Fe³⁺，此过程共产生2.24升H₂（标况），则下列判断正确的是（　　）

下列词语中，注音和书写全都正确的一项是（   ）

在陶瓷、铁、玻璃中，属于导体的是____ ；在输电导线、发电机线圈、电炉丝中，不可能应用超导材料的是____ ．