We are students of Fuxing Middle School. In our school, there are many teachers and students. There are some trees, too. There are forty-five students in our class, twenty–four girls and twenty-one boys. Our classroom is big. There are six windows and two doors. There are four pictures on the wall. On the front(前面的) wall there is a big blackboard. Our desks and chairs are new. Our classroom is very nice.

小题1:90． --What’s the school’s name?

It’s                            .

小题2:--How many students are there in the class?-- There are          . 

小题3:–Is the classroom big or small? –It’s            .

小题4:–What’s on the wall? –There are four           on the wall.

小题5:On the front(前面的) wall there is a big           .

在给定温度下发生下述反应：4FeS₂（s）+11O₂（g）====2Fe₂O₃（s）+8SO₂（g）  ΔH="-3" 319 kJ/mol，又知反应后的固体残渣中含有4%的FeS₂，试计算燃烧1kg这种硫铁矿时放出的热量。