题目

阅读理解 India has a very vast history and heritage（遗产）. The country has witnessed some of the most important events in the past and every event has an effect of its own on the culture, religion, lifestyle, and economy of the country. This is one of the leading reasons why tourists prefer India to travel and explore. Historical tours in India provide everything that a traveler expects from his/her journey. These historical tours give an opportunity to study and explore Indian history. Historical tours of India generally consisted of four phases: ancient, medieval（中世纪的）,有关实验室用燃烧红磷的方法测定空气中氧气的体积分数的说法错误的是（　　）A．红磷作反应物是因为它是固体B．实验室是利用化学反应后装置的内外压力差，造成水位上升并以此确定氧气的含量C．红磷必须过量D．该实验还可以证明空气中的其他气体不与红磷反应