按要求写古诗。  

例：学校餐厅：谁知盘中餐，粒粒皆辛苦。   

庐山瀑布：                                                                       

沙漠落日：                                                                       

中秋佳节：                                                                        

朋友情谊：                                                                    

四甲吡嗪是下列哪一味药的有效成分（）

A.丹参

B.延胡索

C.川芎

D.蒲黄

E.黄芩