招徕定价策略及其应用

招徕定价的奥妙就在于人们会在低价或高价的诱惑下来到商场，按照心理学的观点，人们 在逛商场时，会自然或不自然地产生购买欲望，产生“冲动性购买”，从而达到扩大销售、增加 利润的目的。

Physiological traits of rice seedlings in response to inorganic arsenic

The aim of our study was to better understand the different responses of rice seedling to different species of inorganic arsenic As203 （As（Ill）） and Na2HAsO4 （As（V））. Our results indicate that the biomass of rice seedling decreased as arsenic concentration increased, with the decrease being more significant at higher arsenic concentrations. In addition, the analysis of superoxide dimutase （SOD）, peroxidase （POD）, and catalase （CAT） in rice roots and leaves showed that the activity of these three enzymes significantly decreased in rice tissues, especially in rice roots, as arsenic concentration was increased,. Further, the uptake and utilization efficiencies of N, P, and K were found to decrease as arsenic concentration was increased. However, the uptake and utilization efficiencies of P and K were mainly affected by As（IlI）, whereas those of N were mainly affected by As（V）. Inductively coupled plasma-mass spectrometry （ICP-MS） was used to assay arsenic accumulation in rice tissues; the results indicate that the arsenic content in rice tissues was enhanced when arsenic concentration was increased, especially in rice roots after arsenic treatment.

浅谈初中生物课堂教学个性化导入技巧

初中的生物课应强调学生学习的主体地位,教师应在领导和服务方面做得很好。在课堂教学中,教师巧妙的课程设计不仅可以激发学生对学习的兴趣,还可以激发学生的思维,快速理解课堂教学内容,从而提高课堂学习的效率。

简论如何提升图书馆吸引力和资源利用率

图书馆对学生的吸引力不足,影响了图书馆的育人功能,同时也违背的图书馆开始建立的宗旨,使图书馆成为了摆设。那么为了提高图书馆的信息资源的利用率,如何来增加图书馆对学生的吸引力呢?

Q-900水溶液全循环法尿素工艺节汽技术的开发

Q-900水溶液全循环法尿素工艺是在各尿素生产厂配合协作下不断开发的，在技术实践中产生的，凭作者50余年的生产实践经验，用到原小尿素装置的增产节能技改中，逐步完善的节能工艺。本工艺是在中压段多回收甲铵反应热的节能工艺：回收热能的方法是反应热与加热稀尿液是直接的热交换，所以提高了热能利用率。首先是改变操作工艺，以增加热能利用段的热能回收率。使用预分离．预蒸馏工艺流程后。认识到预蒸馏气的气相组成有大幅度的改变，即NnJC02下降50％，CO2分压上升88％，则在热能利用段使用稀组分的二甲液，使热能回收率进一步提升。再是用好一吸外冷却器，由于预分气中有92％的NH3，直接进入一吸外冷却器，可更多的吸收预蒸馏气经热利用段后残留的CO2量，使进入一吸塔的CO2量下降，极大地稳定了一吸塔的操作：两个吸收CO2的设备，都是一吸塔的外移吸收段，可吸收一分气中85％的CO2量，即生成甲铵的热能回收率达到85％。