当代师范生信仰状况的调查与思考

文章在充分调研的基础上,客观地分析总结了当代师范生的信仰状况,提出了当代师范生的主流和存在的一些新情况,并提出了新形势下加强和改进师范生信仰教育的对策.     

液化石油气发动机燃料供给系统的设计方案与性能比较研究

液化石油气(LPG)发动机燃料供给系统已经历了三个发展阶段,国外已开发出第三代产品。将三代LPG发动机燃料供给系统的设计方案作了简要介绍,并对其性能作了比较分析,从中可了解国外LPG发动机燃料供给系统的发展历程以及各阶段的技术关键,供国内同行参考。     

农村精神文明建设现状分析与对策

新时期农村精神明建设出现下滑的趋势，部分农民理想信念淡化，封建迷信沉渣泛起社会治安形势恶化，铺张浪费现象严重。这种局面的形成除了部分领导认识不到位，抓得不力外，也与近年精神明建设投入严重不足及不良的社会大环境有关。因此，解决这些问题，一要提高认识，二要讲求实效，三要加大投     

汇率干预中的多点自由边值问题的数值计算方法

1IntroductionIt is i mportant for the economic development of acountry to maintain the stabilization of exchange rate,so the intervention of exchange rate has become thetopic of the main concerns of the economic and math-ematical circles[1-5].To maintain the stabilization ofexchange rate,many countries use target zone re-gi mes,that is,the central banks intervene in the for-eign exchange market such that the exchange ratestays within the interval[a,b].There are fixed costand cost proportional …     

教师信息技术培训的现状及建议

随着信息技术的发展,教师的信息技术培训工作变得越发重要,但是目前我国的教师信息培训工作还存在很多问题。本文通过分析现状,在培训内容、教学方式、教学内容及形式、考核等方面提出了相关的建议。     

以人为本创新机制推进和谐校园建设

建设和谐校园是一项系统工程,关键是要牢固确立以人为本的理念,创新建设和谐校园的机制,提高建设和谐校园的能力,实现学校和经济社会的和谐发展。     

谈谈声乐表演专业学生的嗓音保护

透视当前嗓音保护的现象,阐述了嗓音保护的重要性,并结合教学实践,提出了一些保护嗓音的可行性方法.     

让学生成为历史课堂的主人——教学尝试之心得

新课程的关键在于教学创新。如何创新，众多一线教师高招很多，各不相同。笔者近期在高二理科班的历史必修Ⅲ教学中做了一些尝试，旨在充分发挥新课程所提倡的学生主体性和教师主导性相结合的精神，仅供参考。     

Investigation of iodine concentration in salt,water and soil along the coast of Zhejiang,China

Objective: We aim to describe the environment iodine concentration in salt, water and soil along Zhejiang Province coast in the China foreland. It will be helpful for us to judge whether this area is insufficient in iodine and universal iodized salt is necessary or not. Methods: We collected iodized salt samples, drinking water samples (tap water in the towns, and well water or spring water in the villages), water samples from different sources (ditches, lakes, rivers) and soil samples through random sampling in June, 2005. Salt, water and soil iodine was detected by arsenic-cerium redox method. Statistical analysis was expressed as mean±SEMby Windows SPSS 13.0. Results: (1) The iodine concentration in salt was 27.9±4.33 mg/kg (n=108). (2) Seventy-five water samples were collected. The water iodine value was 0.6～84.8 μg/L (mean of 11.66 μg/L). The watershed along the Qiantang River has significantly higher iodine content than the water in Lin'an in mountain area (P＜0.01). The iodine content and mean iodine content of tap water, well or spring water and natural water sources were 4.30±2.43 μg/L (n=34), 23.59±27.74 μg/L (n=19)and 12.72±10.72 μg/L (n=22) respectively. This indicated that among environmental water sources, the ditch iodine content was the highest with river water iodine being the lowest (P＜0.01). (3) Soil iodine value was 0.11～2.93 mg/kg (mean of 1.32 mg/kg).Though there was no statistical difference of soil iodine in different districts (P=0.131), soil iodine content correlated positively with water iodine content. Conclusion: Iodine concentration in salt accords with national policy of adding iodine in salt. Foreland has more iodine in water than mountain area. The data reflected that water and soil iodine in foreland area was not high, which suggests universal iodized salt should be necessary. Environment iodine has relatively close association with pollution.