前言

In chapter one, we reviewed the applications of samarium reagents in organic synthesis in recent years.

前言，2.Sm/CoCl〓体系促进的有机反应在有机合成中的应用，3。

The theoretical maximal water production of horizontal sedimentation is the value u 0 in sedimental test.

前言在我国，沉淀构筑物应用最广泛的是平流沉淀池及斜管沉淀池[1] 。包钢给水厂黄河水源地现有五座平流沉淀池、四座(10 0 )辐射式沉淀池。

In recent years, the application of computer gradually seeped to each domain along with the rapid development of the information technology of our country.

前言随着企业的发展，对企业财务管理的要求也逐步提高。然而，目前很多企业仍旧采用传统的手工的财务业务处理方式，管理水平还停留在纸作业的基础上。

The study on supramolecular chemistry is currently a significant topic of chemistry ...

超分子化学是当前化学与生命科学前言中最重要的研究领域之一。

The frame of my dissertation is just as follows:Introduction:Synopsize Chinese traditional theories of humor and literature and point out that in China modern theories of humor have gradually set up since "human" was discovered in the May 4th campaign.

论文框架如下：前言：简述我国有关传统幽默理论及幽默文学的发展概况并指出直到&五四&新文化运动随着对&人&的发现，中国现代幽默理论才逐渐得以确立。

By means of UV and fluorescent light exposure accelerated corrosion test,the influence factors of corrosion inhibition on anti- tarnishment of silver antiques were studied with L16(45)orthogonal table in this paper.

1前言硫化作用是银在自然环境中变色的重要原因，而光照又引起了加速腐蚀作用。

The dehydrogenation of tetralin over Ni-Mo/Al2O3, Fe2O3/Al2O3, Fe2O3 and FeS2 has been shown in this investigation to be a typical consecutive reversible reaction, with a small amount of 1, 2-dihydronaphthalene as an intermediate.

一、前言近年来煤的直接液化技术出现了不少新工艺'，这些新工艺的特点是较好地发挥了供氢溶剂和催化剂的共同作用，使反应条件得以缓和，氢耗降低，并提高了产品的收率和质量。

The servo controller regards TI Company DSP chip TMS320LF2407A as the main chip,has adopted standard ISA bus structure,has high -integration and high-agility,has accomplished in real-time complex boolean calculation and control algo- rithms during motion control,and can be used to realize high-speed and high-accuracy servo control for mul- tiple axis.

O前言以DSP为核心的多轴伺服控制器越来越广泛地应用在运动控制系统中，上位机只需对被控对象实施总体的控制和管理，而位置反馈信号的采集，闭环控制计算及控制量的输出均由伺服控制器完成，具有运算速度快，支持复杂的运动算法的特点，能实现高速度、高精度的位置伺服或轨迹

In present paper the Surface electric properties of alumina trihydrate and its effect on adsorption properties of surfactants on ATH / Water interface were examined.

l前言氢氧化铝作为无机阻燃剂在塑料工业中已得到了广泛应用，其表面有机化改性是其应用中最引人注目的重要课题¨q'。

A new method of a centrifugal compressor with a hub airfoil-vane diffuser was proposed and applied based on the investigation of a centrifugal compressor with vaneless diffuser.

0前言扩压器是离心式压缩机一个级的重要组成元件之一，主要分为有叶扩压器和无叶扩压器两种。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。