A～H是初中化学常见的物质，已知A为黑色固体单质，G为紫红色固体单质，B为红棕色粉末，H为蓝色的硫酸盐溶液．它们的转化关系如图所示，回答下列问题．

《“文明”与“文化”》是一篇学术论文，也就是我们常说的社会科学论文(简称“社科文”)。文章的题目是论题，全文的论点是：文明与文化____，文明是____，文化是表现形式;不同文化之间的交流与渗透是____的，必要的;当今，我们要自觉地成功地进行文化系统问的交流与渗透。

人类生存需要清新的空气，下列情况不会造成空气污染的是（   ）

    Our school is on Guangming Street. It's next to the People's Library. There is a park across from our school. The pay phone is between our school and a post office. Our school is very beautiful. There are many trees and flowers in it. If you want to come to our school from the airport, take a taxi and go down Center Avenue. You can see a big restaurant on your right. There is a bridge near the restaurant. Go across it and turn left. Then go down Bridge Street. Turn left at New Park and go down Guangming Street. Our school is across from a bank.