Passage TwoWhen did bacteria come into ventilation system according to the

游客2024-11-03  0

问题     Passage Two
When did bacteria come into ventilation system according to the passage?

选项

答案 When the warm air was sucked back.

解析 由题干关键词bacteria和ventilation system定位至第三段。该段首句指出,20世纪70年代人们发现空调带来的一种危害就是军团病。接下来解释了空调的致病原理:从冷却塔压出的热空气又以某种方式被抽回了进气孔,这些热空气为从室外带进来的致病菌的快速繁殖提供了绝佳的温床,而在室外时,致病菌数量很少,不足以造成危害。可见,细菌是在热空气被抽吸回来时进入通风系统的,故答案为“When the warm air was sucked back.”。
转载请注明原文地址:https://tihaiku.com/zcyy/3829673.html
最新回复(0)