Group A: There were no ventilation on the non-ventilated lung open to the air;
组在单肺麻醉期间非通气侧肺的支气管导管直接开口于大气中；
Turn off ventilation and lights when no one is in a kitchen?
没有人在厨房时候，关闭通风系统和灯?。
Advantages: low cost of foundation construction installation, easy maintenance, good ventilation, simple maintenance, no water.
【优点】：基础施工费用低安装，维修方便，通风良好，维护简单，无积水。
Installation easily: There is no need to install ventilation system under the ground.
在地板下无需安装通气和通风系统。
Installation easily: There is no need to install ventilation system under the ground.
在地板下无需安装通气和通风系统。
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