说明：  简易温度计是基于C51单片机设计的，以热敏电阻作为温度测量电路，测量的温度能够精确到0.5°C，并具有门限报警功能。
(Simple thermometer is based on the C51 single-chip design, as thermistor temperature measurement circuit, temperature measurement is accurate to 0.5C, and threshold alarm function.)