1. According to the present situation of classing teaching of Caculous, the author brings forword several introspections and suggestions for further consummations. 针对分级教学实施状况，提出了反思和进一步完善的建议。
2. The factors which influences the service life of catalyst for etherification are analyzed, and the measures to lengthen its life are putted forword. 分析了影响醚化催化剂使用寿命的因素，提出了延长醚化催化剂使用寿命的措施。
3. The methods for solving these problems are put forword as follows: ①the method of airphoto scale ranges from 1/4 to 1/6 of map scale; 并提出了解决问题的方法：山区航空摄影合理的摄影比例尺应是成图比例尺的1/4~1/6；
4. Analysed deeply about automatic fire detector for smoke, automic fire alarm system, especially, the design of muti task real time system is put forword. 探讨了感烟探测器、自动警报控制器的设计，着重探讨了多任务实时系统的程序设计。
5. Analysed deeply about automatic fire detector for smoke, automic fire alarm system, especially, the design of muti task real time system is put forword. 探讨了感烟探测器、自动警报控制器的设计，着重探讨了多任务实时系统的程序设计。
