题目

Langshan Mountain,lying in Xinning County,is about 500 kilometers away from Changsha.It is one of China’s National Geological Parks and is famous for its special Danxia landform(丹霞地貌).Covering an area of 108 square kilometers,Langshan Mountain has rich natural scenery and lots of tourism resources.There are more than 60 scenic spots(景点)in Langshan Mountain,among which the most famous are Tianyi Lane(天一巷),Chili Peak(辣椒峰),Bajiao Stronghold(八角寨)and so on.On August 2nd,2010,Langshan Mountain was recorded in the World Heritage List(世界遗产名录)and became China下列四种生物中细胞结构与其他三种区别最明显的一种是（ ）A. 发菜 B. 变形虫 C. 乳酸杆菌 D. 颤藻