& gt 1. Can you tell which raw materials can be extracted from coal and oil _ Hebei Education Press, the second volume of the fifth grade primary school science teaching plan

Ancient Rygula medical silicone raw material bottle ancient Rygula medical silicone raw material bottle ancient Rygula is a feeding product brand of the company, and its products mainly include milk bottles, silicone nipples, cups and pots, children's tableware and other series. The raw materials of the products are imported safe PP, PES and medical silica gel, and the printing inks are all environmentally friendly and do not contain heavy metals. All products meet the standards of the US Food and Drug Administration (FDA) and sell air to oil tycoons. It is said that an oil tycoon went to heaven for a meeting. When he entered the conference room, he found it was crowded with people and there was no place to sit down. So he had a brainwave and shouted: oil was found in hell! This shout doesn't matter. All the oil tycoons in heaven have gone to hell. Soon, only the later oil tycoons are left in heaven. At this time, the tycoon thought, everyone has already run away ... situational awareness, refining and generalization, strategy creation situational awareness, refining and generalization, strategy creation-talk about several links in application problem teaching (Spencer Pan, Baoshan Experimental Primary School). The main task of application problem teaching is to cultivate students' ability to solve simple practical problems and develop their thinking. This has become the consensus of teachers. In order to accomplish this teaching task better, I think we should pay attention to the following links in the teaching of applied problems ... The excavation and refinement of aesthetic education in new mathematics textbooks can not be separated from the implementation of quality education, which can not only cultivate students' sound personality, good temperament and elegant taste, but also optimize the teaching structure of mathematics classroom, enrich the teaching content and improve the quality of education and teaching, so as to comprehensively develop students' personality and improve their comprehensive quality. At present, the excavation and refinement of aesthetic education factors in new mathematics textbooks can not be separated from aesthetic education. Aesthetic education can not only cultivate students' sound personality, good temperament and elegant taste, but also optimize the teaching structure of mathematics classroom, enrich teaching content and improve the quality of education and teaching, so as to comprehensively develop students' personality and improve their comprehensive quality.