A. It rises above cooler air and cools as it rises B. Atmospheric pressure drops as warm air rises C. Moisture in warm air condenses as the air is cooled D. All of the above
A. 旅馆业治安管理信息系统出现故障,旅馆未向公安机关报告情况,长期手工登记入住旅客信息 B. 旅馆的其他从业人员使用前台登记员专用帐户代替前台登记员采集上传旅客信息 C. 旅馆业的经营地址位于二楼