题目

How do the teenagers(青少年) of today want to wear? We asked four teenagers: 13- year-old Marla, and 15-year-old Grace, David and Ryan. All the four knew what they wanted and where to find it. Music played a much bigger role than catwalk fashion.Ryan is wearing the red headphones, he said, “I’d like a pair in every color to match(搭配) all my clothes.” David plays the guitar and sings in a rock band. He gets his fashions well as his music from the pages of NME. The girls, too, put clothes and music together. Grace likes high–wasted(高腰的) shorts and boots. Marla is the lead si古代“药金”外观与金相似，常被误认为是金子，它的冶炼方法如下：将碳酸锌，赤铜(Cu2O)和木炭混合加热至800℃，得到金光闪闪的“药金”，则“药金”的主要成分是________，有关化学方程式是_____________________________、_________________________、____________________________。