多种

The constitution of surveillance nocuous air system adopts gas sense organ QM-N5 and SCM AT89C2051 is introduced, and the design proposal based on it is described, along with buildup of sense organ circuit and operation principle.

采用气体敏感元件QM—N5与单片机AT89C2051构成有害气体监测系统，介绍了系统设计方案以及传感器电路组成与工作原理，设计了系统软件。

And popular culture not only identifies suburbia as the place of dystopian nightmares, but promotes urban living as the embodiment of that most important of 21st century values: sexy fun.

现在流行文化不仅仅认为郊区是反乌托邦的噩梦所在之地，并且推崇城市生活，认为它是21世纪最重要的价值观——性愉悦的体现。