Which one is NOT included in Chinese well-known mountain ranges? A: Hinggan Mountains B: Qinling Mountains C: Qilian Mountains D: Hengshan Mountains

Qinling Mountains serve the environmental functions of _________.<br/>() A: climate regulation B: soil conservation C: water maintenance D: biodiversity<br/>conservation

中国南北方的天然分界线是（）The natural boundary between the north and the south of China is ( ) A: 长江Yangtze River B: 珠江Pearl River C: 秦岭-淮河一线Qinling Huaihe line D: 黄河Yellow River

The Qinling Mountains are located in the heart of China. It is a central mountain range connected to the Kunlun Mountains. Among them, Taibai Mountain is called the majestic beauty, Cuihua Mountain is called the incomplete beauty, and Huashan is called ( ). A: Deep beauty B: The beauty of danger C: The beauty of the ruins D: Majestic beauty