习题

Based on the contrast of several sets of physical teaching materials of engineering, according to differences in preface, contents, illustrations, knowledge points, examples and exercises, applicability, readability and teachability, looking for several problems in current teaching materials, for instance, the contents are staleness, and the concepts and methods of modern physical are outmoded, and the concepts and methods of modern physical aren't reflected duly; it is not very good to join with physical teaching materials of middle school in our country, and it is only easily repeated in some of contents.

本文通过国内几套工科物理教材的对比研究，从前言，内容，插图，知识点，例题习题，适用性，可读性，可教性等方面的差异，寻找现行教材存在的问题如：内容陈旧，近代物理概念和方法没有得到应有的反映，与我国中学物理教育衔接不好，不少内容只是简单重复等。

We should carry on the effective thinking practice variedly through systematic revision choosing better materials and doing more practice .

在初中总复习阶段必须强化数学思想方法的领悟，通过知识系统的复习，范例精选精讲及习题训练和良好的思维训练的环境培育多角度，全方位地对学生进行有效的思维训练，充分培养学生的数学能力。

Besides introducing this Webwork system, the author used questionnaires to investigate students?viewpoints about this system.

因此，理论上，Webwork 确可利用电脑网路技术的进步来导正习题在学习微积分的功用。

I have to do the workbook .

我今天要做习题本。

If you consulted another solution in order to solve the exercise, please mention this in your write-up.

如果您为了解决习题而谘询了其他解答，请在您的报告中提及这件事。

How much is one Zinger Burger in different country at KFC?

习题1：一个肯德基汉堡，在不同国家卖多少钱？

The Double-base Teaching is one of traditional features in the mathematics" education in our country, which focuses on how to cultivate the students" inquiry ability in the daily teaching. First of all, from the beginning of the double-base teaching, we pay attention to the original knowledge during the teaching of concepts, definitions, theorems and formulas. In the case of exercising lessons, we conclude, summarize and train the student"s emanative ideations. In the review lessons, we care about the interconnections of various knowledge. Next, because theopen subjects have the better functions to be researched, we create them in the daily teaching. It is also a very important approach to cultivate the students" inquiry ability.

重视双基教学是我国中学数学教学的传统特色，在日常教学中培养学生的探究能力，应首先从双基教学开始：在概念、定义、定理、公式的教学中注重知识的起源；在例习题教学中，注重归纳、小结及训练学生的发散思维能力；在复习课的教学中注重各知识的相互联系；其次，由于数学开放题具有良好的探究功能，因此，在日常教学中适当创设数学开放题，也是培养学生探究能力的一个重要途径。

Mathematics exercise solution thought process displays in:Recognition and understanding, association and exploration, appraisal and choice, operation and realization, promotion and consummation; Its thought characteristics display as integrity, radiation and astringency, goal consciousness, disorderly and ordering, non-logical and logicalization characteristic.

数学习题的求解的思维过程表现在：认识与理解、联想与探索、评价与选择、操作与实现、推广与完善；其思维特征表现为整体性、发散与收敛性、目标意识、无序与有序化、非逻辑与逻辑化特征。

2 Polytropic process; Analysis and plot illustration of thermodynamic process

4.2 多变过程；热力过程的计算和图示习题课

This collection covered the whole middle school education programme and was ingeniously composed of summar ies of each lesson, examples and exercises with answers.

这套书囊括了法国中学教育的全部课程，并且编辑的很好；每一课程都由课程概要、习题举例、练习和提示答案组成。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。