为保护环境，对含镉固体废弃物必须及时处理。下面是处理过程中某一重要反应CdSO₄＋Na₂S ＝ CdS↓+ Na₂SO₄，通过该反应把可溶性的CdSO₄转化为不溶性的CdS，以减轻对土壤的污染。该反应的基本类型是____  。

    My name is Dave. I have three good friends, Jack, Tom and Jim. Jack likes cakes, Tom likes fruit, Jim likes eggs and I like vegetables. We all like hamburgers. We eat hamburgers for lunch every day. Jack and Tom like French fries , and I also(也) like French fries, but Jim doesn't like them. For dinner, I don't like chicken,    ⑶    Jack, Tom and Jim like it. They all think chicken is very delicious.

根据短文内容，回答下列问题。

小李30天一共跑了45000米，小张平均每天跑的距离比小李多200米，问小张30天一共跑了多少米，请列出等量关系式____。