IN accordance with the growing accidents of hazardous chemical leakage concerned,this paper introduces the poisoning caused by common hazardous chemical leakage,the emergency measures for poisoning people,and the disposal measures for the accidents of hazardous chemical leakage.

It is the content of quality education and the duty of chemistry teachers of middle school to strengthen fire safety education for students and develop the students' emergency response capabilities. This paper introduces the classification of fire, fireextinguishing methods, the performance and application of fire extinguishing agent, and emergency escape skills, aiming at enriching the content of fire safety education.

In this paper,the origin and synthesis of xylitol is introduced,and the uses of xylitol in improving sugar diabetes symptoms,treatment of lung infection and other fields are given.Finally,the de-velopingprospect of xylitol is also expected.

In accordance with the requirement of industry for plating layer with high corrosion or wear resistance property,the method of chemical plating and the composition of plating solution are analyzed,the corrosion rate is determined,and the performance of the plated layer is investigated. Several affecting factors for corrosion rate are discussed,and some processes are optimized.Accordingly,electroless plated nickel-phosphorus layer on various metal surface with better corrosion resistance comparing with electro plated layer.

This paper tries to look at chemistry from the culture perspective,analyzes the connotation of chemical culture,and clarifes the educational functions of the chemical culture.Then according to the study of chemical culture,it makes a discussion on chemical education from the point of view of chemical culture,and the ways to reflect chemical culture in chemical education.