二十个

In this paper, through a series of experiments, two series of quaternary-ammounium Gemini surfactants were synthesized, namely the pair alkylene double quaternary ammonium salt surfactant m-s-m·2Br and the pair the alkylene double quaternary ammonium salt surfactant -s-·2Br. We has carried on the attribute with the infrared spectrum to its structure, and to affected the factor which the synthesis pair the alkylene double quaternary ammonium salt surfactant responded to carry on the discussion. We has discovered the synthesis pair the ethylene double quaternary ammonium salt surfactant m-2-m·2Br optimum condition: The bromo alkane and a tetramethyl ethylene diamine mole of ratio is 3.0: 1.0, makes the solvent by the ethyl alcohol, 80℃ under responds for 48 hours in the backflow temperature; Synthesis pair alkylene double quaternary ammonium salt surfactant 12-S-12 ·2Br optimum condition: 12 tertiary amine and 1, 3- propylene dibromide (1, 4- two bromines butane) a mole of ratio is 2.2: 1.0, makes the solvent by the ethyl alcohol, responds for 48 hours in the constant temperature 80 ℃ under backflow.

本文通过一系列的实验，合成了两个系列的Gemini型表面活性剂，即双烷撑双季铵盐表面活性剂m-s-m·2Br和双烷撑双季铵盐表面活性剂-s-·2Br，用红外光谱对其结构进行了表征，并且对影响合成双烷撑双季铵盐表面活性剂反应的因素进行了讨论，找出了合成双乙撑双季铵盐表面活性剂m-2-m·2Br的最佳条件：溴代烷与四甲基乙二胺的摩尔比为3.0：1.0，以乙醇作溶剂，在回流温度80℃下反应48小时；合成双烷撑双季铵盐表面活性剂12-s-12·2Br的最佳条件：十二叔胺与1，3-二溴丙烷(1，4-二溴丁烷)摩尔比为2.2：1.0，以乙醇作溶剂，在恒温80℃下回流反应48小时。

Meichuan Wuxue City is located in the northern part of town, is located in Qichun, Huang, Wuxue three counties junction, the territory of 272 square km area, 142,000 of the total population, urban area of four square kilometers, urban population of 36,000 people, Xiaman 5 community, 79 administrative villages: Meichuan, politics, Pu Mei, Sangzi Park, Mountain, Yang embankment, slope Wuli, Wang, Whitehead, Zhang, the next process, Tonggu, Shilipu, bridge, storm dragon, cursory, FAN Bo tree, Nguyen Gallery, Fan should be you, Miss V VII, Si-Li, Luo, including France, West Wing, Zheng Hu, Wang埒, solutionsnian ci , Zhen Lu, Xie Jin Pei, Lü ancestors, Lu Quan II , Water Tower Bridge, Chestnut Hill, Hu, Yang Shop,chen fu lu , Si River, Zhang Ji, inserted Kei,垴Kenzan, Wu farm, Shek, stone vessels,垴solutions, Li 2, Sally population, Village, Song Li benefit Zhao, Mountain, buried Guo, Wu, Song Chong, lotus leaf forest, evergreen forest, peaks I, together, under Zhao, View Hill, Stephen I, Changling, Zhang Xian, Wang, Zhang card, Home Wensheng, Ma Long, last Hao, Taos,fang hong , home bars, Liu, Rao for the city, Cai, pangu file Chapter I.

梅川镇地处武穴市北部，位于蕲春、黄梅、武穴三县结合部，版图面积272平方公里，总人口14.2万，城区面积4平方公里，城区人口3.6万人，辖5个社区，79个行政村：梅川、从政、梅浦、桑梓园、灵山、杨垸、五里坡、王胜、白石、张焕、下程、铜鼓、十里铺、桥头、困龙、走马、范柏树下、阮廊、范应佑、吴伏七、李兴泗、罗林、包法、永西、胡政、王埒、解念慈、卢子珍、解金坡、吕兴祖、鲁全二、塔水桥、栗山、胡立、杨铺、陈福禄、思河、张思济、插箕、干山垴、吴畈、石牛、石船、解垴、李云二、仙人口、南村、宋林、李受益、赵俊、岳山、郭埋、吴大、宋冲、荷叶林、绿林、峰口、同心、下赵、观山、泉口、长岭、张德先、王贵、张牌、居文胜、马垅、上郝、陶斯、方洪、居杠、刘昌、饶为市、蔡林、盘古档、胡导章、吕四房、夏柳、司古塔、回垅。

Food and beverage industry in Nanjing district attendants about the basic wage 900-1200 this way, but what are you going to look at specific industries, if large-scale hotel, the staff are generally corkage fee, which is a considerable revenue to those small hotels wages will naturally lower, Hengtong is signed, the general three-month trial period, and then give you three months after the conversion as to raise wages, the average down the catering industry in Nanjing Attendants wage level in 1000 is probably about money, but for the occupants to eat, in addition to a monthly twenty or thirty dollars to pay the cost of utilities.

在南京市区餐饮行业服务员的基本工资大概在九百到一千二这样子，不过要看你干什么具体行业了，如果到大规模的酒店里，服务员一般都有开瓶费的，这也是一笔可观的收入，到那些小型饭店工资待遇自然要低一些，恒通是要签的，一般试用期三个月，然后三个月后给你转正工资也随着提高，平均下来南京地区的餐饮业服务员工资水平大概就在一千块钱左右，不过是供吃供住的，除了每个月要交二三十块钱的水电费。

The variable geometry truss mechanisms have been studied extensively and systematically by this project. The research plan has been completed all sidedly, and expected results have been obtained. Three new kinds of combination decahedrons and a new class of variable geometry truss mechanism, which is composed of an octahedron and three tetrahedrons connected in parallel form, are proposed. The position analyses for decahedrons, dodecahedrons, triple-octahedrons, combinations decahedron and a new type of structure of variable geometry truss mechanisms are presented by introducing additional extra linear displacement sensors and using resultant elimination and homotopy continuation algorithms. The method of kinematical analysis of variable geometry truss mechanisms is established.

课题组对变几何桁架机构进行了深入的研究，全面地完成了研究计划，取得了预期的成果；提出了三种新的十面体组合机构以及由一个八面体和三个四面体组成的新型变几何桁架机构的结构形式；应用结式消元、附加传感器和同伦方法等提出了十面体、十二面体、三重八面体、组合十面体和新型变几何桁架机构的位置分析方法；建立了变几何桁架机构运动分析的一般方法；建立了简洁的凯恩和拉格伦日动力学的模型；应用有限元和子结构方法，提出了变几何柞架机构弹性动力学模型，导出了逆动力学方程的显式形式；设计和研制了一台可折叠的八面体变几何杵架机构装置等。

Bill the moocher, the best built man of us all, a Herculean sturdy beggar who smelt of beer even after twelve hours in the spike, told tales of mooching, of pints stood him in the boozers, and of a parson who had peached to the police and got him seven days.

二癞子比尔是这里面身体最壮的，模样像个巨灵神，在收容站呆了十二个小时之后，这家伙还是满嘴啤酒气，他吹嘘自己的光辉事迹，说某某某在酒馆请他喝了几品脱的啤酒，又说某某某把他告了官，警察押了他七天。

By bioactivity-guided isolation, 14 compounds were obtained from the active fractions. 13 of them were determined as 9,9'-dihydroxy-8,8'-dimethoxy- l,r-methyl-lH,lH'-[4,4']binaphtha

本研究利用稻瘟霉筛选体系对红葱的60％乙醇提取物及其氯仿、正丁醇和水的萃取部分进行了活性筛选，并对活性部位的活性化学成分进行了跟踪分离，从中分离得到十四个化合物，利用物理化学和光谱学的方法对其中十三个化合物的结构进行了鉴定，分别为9，9'-二羟基-8，8'-二甲氧基-1，1'-二甲基-1H，1H'-[4，4']双萘并

To assess the sensitivity of local species to toxic chemicals relative to those from other jurisdictions reported in the literature, ecotoxicological testing was also performed on three local marine species, Dunaliella salina, Brachionus plicatilis, and Lutjanus malabaricus, using 12 representative PPTSL chemicals including metals, pesticides (endosulfan, diazinon, permethrin, atrazine, tributyltin), and industrial chemicals (di-n-octyl phthalate, nonylphenol, acenaphthene).

为了评估与其他相关成文规定的当地有毒化学品种类，生态毒性测试也在三个地方的海洋物种上进行，杜氏盐藻，轮虫和红鳍笛石斑鱼，使用了十二种pptsl代表的化学元素，包括金属，杀虫剂（硫丹，二嗪磷，氯菊酯，莠去津，三丁基锡），和工业化学品（苯二甲酸二正辛酯，壬基酚，苊）。

For the above purposes, using a tailored cyanometalate precursor,(1) Tp=hydrotris (pyrazolyl borate; Bu〓N〓=tetrabutylammonium cation , two trinulear complexes,〓(2),〓(3; cyclam: 1, 4, 8, 11-tetraazacyclotetradecane), two one-dimensional polymers,〓(4; dien: diethylenetriamine),〓(5), and a cluster 〓(6) have been synthesized and characterized structurally and magnetically.

基于上述研究热点，我们以修饰的氰基金属化合物(1)为构筑基元（Tp：三吡唑基氢硼烷，Bu〓N〓：四丁基铵离子），合成了两个杂三核化合物，〓(2)，〓（3；cyclam：1，4，8，11-四氮环十四烷），两个一维聚合物，〓（4；dien：二乙烯三胺），〓(5)，和一个十四核簇合物〓(6)。

There are 27 hexapeptides , 10 nonapeptides , two peptides containing, respectively, 11 , 12 and a tripeptide in the repetitive domain.

在重复区中含有24个六肽，5个九肽，以及位于重复区起始端的十一肽和十二肽和重复末端的三肽。

College with a five-line (Department of motor vehicles and highway system, mechanical system, management system, navigation system, the Department of the foundation), the seven party and government regulatory agencies (Office of Personnel organizations, academic and scientific research, student work , Financial audit, general services, adult education), the two institutions Teaching, set up transportation, construction, electronic information, such as the top-five, 12 second class, a car, road , Machinery, management, navigation and so on as the main direction of full-time high of 28 professional and 12 full-time professional五年一贯制high, 11 full-time professional technical secondary school, 26 adults and specialist undergraduate professional correspondence, 24 Tele-education specialist undergraduate and professional, self-4 Undergraduate; established Dalian Maritime University, Shandong University of Science and Technology training, recruiting 12 months of research master classes.

学院设有五系一部(汽车系、公路系、机械系、管理系、航海系、基础部)、七个党政管理机构(办公室、组织人事处、教务与科研处、学生工作处、财务审计处、总务处、成人教育处)、两个教辅机构，开设交通运输、土建、电子信息等五大类、十二个二级类，以汽车、公路、机械、管理、航海等为主要方向的28个全日制高职专业、12个全日制五年一贯制高职专业、11个全日制中专专业、26个成人函授专科及本科专业、24个远程教育专科及本科专业、4个自学本科专业；分别设立大连海事大学、山东理工大学培训点，招收12个研究方向的硕士研究生班。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐