题目
The three basic components of a fire are chain reaction, heat, fuel, and ____.A. carbon monoxideB. oxygenC. carbon dioxideD. any gaseous substance
The three basic components of a fire are chain reaction, heat, fuel, and ____.
A. carbon monoxide
B. oxygen
C. carbon dioxide
D. any gaseous substance
题目解答
答案
B. oxygen
解析
火灾的三个基本组成部分是链式反应、热量、燃料和氧气。氧气是支持燃烧的必要条件，没有氧气，燃烧过程无法进行。