人教版普通高中课程标准实验教科书：《高中数学》新课标电子版（A版）选修3-3 球面上的几何

人教版普通高中课程标准实验教科书：《高中数学》新课标电子版（A版）选修2-3

人教版普通高中课程标准实验教科书：《高中数学》新课标电子版（A版）选修2-1

人教版普通高中课程标准实验教科书：《高中数学》新课标电子版（A版）选修1-1

人教版普通高中课程标准实验教科书：《高中数学》新课标电子版（A版）必修4

人教版普通高中课程标准实验教科书：《高中数学》新课标电子版（A版）必修1

Product development has been a major activity in the food industry for over 40 years, but only gradually has it developed as a strategic business area and also as an advanced technology. For a long time it was essentially a craft, loosely related to the research and engineering areas in the company. The pressures for product development came very strongly from the needs of the growing supermarkets for a constantly changing, extensive mix of products and for continuous price promotions. So there was the drive for product difference

Product development does not occur in isolation as a separate functional activity. It is a company philosophy, a basic company strategy and a multifunctional company activity. In recent years to show this all-encompassing basis, bringing together product, process, marketing and organisational innovations, there has been development of an overall innovation strategy. This innovation strategy is related to the company's overall business aims and strategy, as well as the social, economic and technological environment, and the company's own knowledge and skills. The business strategy also includes a duct strategy outlining the products of the future. The combination of the innovation and product strategies is the basis for the product development strategy, and from this can be developed

一、罗尔(Rolle)定理 罗尔（Rolle）定理 如果函数 f (x)在闭区间 [a,b] 上连续,在开区间(a,b)内可导,且在区间端点的函数 值相等，即 f (a) = f (b),那末在(a,b) 内至少有一点 (a    b),使得函数 f (x)在该点的导数等于零

Product development management in the food system is complex, long term and capital intensive. It is total company management involving every function in the company- so it is managing either a microcosm of the company or an integration of the company functions. For a major innovation, the company may set up a new venture company or division; or a new group of people may form a new company. At this time when many new companies are being formed on the innovations of information technology and biotechnology, it is interesting to speculate on new venture companies in the food industry and the basis of their new innovations. But at the present time