张骞第二次出使西域的时间是（    ）

化学与生活生产息息相关，请运用化学知识回答以下问题．

（1）我们常用洗涤剂清洗餐具上的油污，这是因为洗涤剂具有____ 的功能．

（2）家用净水器中含有大量活性炭，其作用是____ ．

（3）建筑需要大量的钢铁，工业上用赤铁矿（主要成分为Fe₂O₃）炼铁的化学方程式是　____ ．

阅读理解

Alan and Cindy are in the same school. There are many school rules here. First, they can’t listen to music in the classroom or hallways. But they can listen to it outside or in the music room. Second, they can’t eat in the classroom but they can eat in the dining hall. Can they wear hats in class? No, they can’t. What other（其他的）rules do they have? They can't fight with their（他们的）classmates, either. Fights can make the teachers really unhappy…

根据短文内容，完成表格

面对中考，两位同学通过QQ如此讨论，你认为不恰当的是（    ）