头的

In Hangchow it has four generations each year and the time of its occurrence is well synchronized with that of the scale.

根据测定，隐斑瓢虫对日本松干蚧各虫态的捕食能力较强，一头成虫的日平均捕食量为：显露若虫13.33头，雌成虫4.27头，卵囊3.67个(每个卵囊内平均有卵265.5粒)，雄蛹28.27只；一头幼虫全期(或2—4龄和3—4龄)分别能捕食显露若虫39.20—105.56头，雌成虫40.80—47.79头，卵囊39.38—41.79个，雄蛹220.50只。

During the manufacturing of the critical intermediate cephalosporin nucleus --7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt, first the feasibility of the one-pot synthetic route of open loop, closed loop and ozonization when chlorine is passed over is qualified by experiments. Then the critical factors that will influence this reaction are studied as follows: the mol ratio of triphenyl phosphite and Diphenylmethyl 3-hydroxy-7-phenylacetaminoceph-3-em-4-carboxylate-l-oxide is four to one; the quantity of the stablizer should be at least more than two to one. The temperature of the system must be 25℃ when chlorine is passed over so that the hydrochloride can be precipitated to obtain cephalosporin nucleus of cefaclor--7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt.

在制备关键中间体头孢母核7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐时，先通过实验验证把开环、闭环、臭氧化三步在通入氯气时并为一锅煮的合成路线的可行性之外，又研究了影响该反应的几个重要因素：亚磷酸三苯酯与3-羟基-7-头孢烷-5-亚砜-2-甲酸二苯甲酯的摩尔比为4：1；稳定剂2-甲基-2-丁烯的用量至少大于2：1，通入氯化氢气体时体系温度在25℃时盐酸盐则能够顺利析出，获得头孢克洛的头孢母核—7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐。

Marc to design folg club and investigate the physical phenomenon of impact between golf club head and golf ball. In order to find out the maximum vom mises stress and permitted wall thickness of different materials for golf club, the stress distribution and propagation of different golf club heads are studied.

Marc结合起来，设计球头，分析高尔夫球头与球碰撞的物理现象，寻求击球瞬间球头所受到的应力冲击及球头各部位的应力状态，从中寻找不同的球头材料所受到的最大应力及允许壁厚，为球头产品的开发、性能评价提供依据。

The RAPD results illustrate that the phylogenetic relationship betweenBothriocephalid tapeworm parasitic in Grass carpCtenopharyngodon idellus(C.et V.and Common carp(Cyprinus carpio L.)from different regions ofChina is infraspecific with noticeable variance bwtween them.Thephylogenetic trees based on the 3 sequences analyses above are constructed,which show the following relationships:Bothriocephalid tapeworms fromGrass carp,Common carp and Luciobrama are found to be monophyletic,and are very close to Bothriocephalus opsariichthydis,but are divergent toanother monophyletic group comprising Bothriocephalid tapeworms fromZacco,Hemiculter and Leuciscus.On the basis of phylogenetic reconstruction,autapomorphic species conceptis used in species delimitation suitablefor determining four species in the present study:B.acheilognathi,B.opsariichthydis,and two other bothriocephalids parasitic respectively inHemiculter and Leuciscus.It is also deduced that the differentiation time ofBothriocephalid tapeworms parasitic in cyprinids is earlier than that of theirhosts,and the most recent specification happened about one million yearsago.Key words Bothriocephalid tapeworm Molecular Systematics

具体成果有：通过RAPD分析探明了我国不同地理分布的草、鲤鱼头槽绦虫的亲缘关系属于种下水平，并存在较高变异；通过基因合并分析重建头槽绦虫的系统发育关系，表明草鱼、鲤鱼及鯮鱼头槽绦虫是单系群，它们与马口鱼头槽绦虫亲缘关系较近，而与〓条、宽鳍鱲及雅罗鱼头槽绦虫构成的另一单系群亲缘关系较远；在此基础上，提出符合头槽绦虫种的界定的独征物种概念，据此确定鲤科鱼类寄生头槽绦虫的四个种：鱊头槽绦虫，马口鱼头槽绦虫，以及另两种分别寄生于〓条和雅罗鱼的头槽绦虫：根据上述研究推断鲤科鱼类寄生头槽绦虫的分化年代早于其宿主，最近的一次物种形成距今约一百万年左右。

The result of frozen MⅡoocytes using three methods indcated that the self-restraintspear method was better than OPS, and the effection of frozen altogether with self-restraintspear method and centrifugal was the best; the frozen effection was not ideal using fluidspear for 8- cell ovocyte.

用三种冷冻方法(OPS法；自制移液枪头法；移液枪头法+离心法)对MⅡ卵母细胞冷冻的结果表明，自制移液枪头法优于OPS法，其中以移液枪头法+离心组的冷冻效果最好；用移液枪头法对体外发育到8-细胞期卵母细胞的冷冻效果不理想。MⅡ期卵母细胞用OPS法冷冻后卵母细胞IVF和电激活的卵裂率都显著高于移液枪头法(P＜0.01)，电激活后2-细胞卵裂率比IVF高。

The conditions to measure accurately and the principles to select parameters of the multi— probes EST method are proposed, and the theoretical research, computer imitation and the experiment on a machine tool prove that these principles and suggestion are necessary and effective. The influence of the initial value errors of the probes, the installation error of the probes system, and the remaining error caused by the radical error motion are analyzed quantitively on the measurement accuracy of the multi—probes EST method. The influence of the error caused by the probe's axes which is not in a plane and the perpendicularity error of the plane which the probe's axes is in to the stational axis are discussed on the measurement results.

结合理论分析，对这些EST方法进行了计算机仿真分析和研究，重点研究了这些方法的应用条件和误差分离精度，所得出的结论是：三测头法EST基本上能实现各项误差的完全分离，适于在位测量使用；二测头法在恰当地选择测头安装角的条件下，可以得到较高测量精度，适于大型零件圆度、圆柱度、径向圆跳动和全跳动的在位测量；对置两测头时域法可以在一定程度上改善单测头法测量精度，但对随机径向误差无能为力；对置两测头频域法存在严重的谐波损失。

The remaining eighteen pigs, served as three viral administered groups, underwent coronary artery ligation and received intramyocardial viral injection. rAAV- GFP group (n=6), rAAV-CD151 group (n=6) and rAAV-antiCD151 group (n=6) animals respectively received direct intra- myocardial injection of rAAV-GFP, rAAV-CD151 and rAAV-antiCD151 1×10~(12 viron particles per pig, at 10 sites correspondingly.

采用三质粒共转染法包装CD151、antiCD151和GFP重组腺相关病毒(recombinant adeno-associated virus，rAAV)。2.1月龄小型猪22头，随机分为4组，分别为正常对照组4头(不予冠脉结扎和注射病毒，正常喂养)，rAAV-GFP组6头结扎冠状动脉左前降支，心肌内分10点注射1×10~(12viron particles的rAAV-GFP病毒，rAAV-CD151组6头结扎冠状动脉左前降支，心肌内分10点注射1×10~(12viron particles的rAAV-CD151病毒，rAAV-antiCD151组6头结扎冠状动脉左前降支，心肌内分10点注射1×10~(12vironparticles的rAAV-antiCD151病毒。

The new type of stackable coextrusion has less wetted area of fluid and the width of die compared with the conventional coextrusion die.

最新砌积式心轴共押模头技术与传统式共押模头相比，砌积式心轴共押模头有比较少的流体接触表面积及模头宽度。

Independent development, production Dan Huangjia head, milling chucks, quick change chuck, chuck tapping, and other top-selling machine annex across the country, and exports to the United States, Japan, Taiwan and other countries and regions, and then to a mere Plans to sample processing.

自主开发、生产的弹簧夹头、铣夹头、快换夹头、攻丝夹头、顶尖等各种机床附件畅销全国各地，并出口美国、日本、台湾等国家和地区，并可乘接来样来图加工。

The process of sand absorption is:(1) the vibration head vibrates and losses the sand layer, and supply high pressure air into the sand absorption head;(2) the high pressure air generates negative pressure in the sand absorption pipe when it is discharged out from the sand absorption;(3) the sand absorption head and the vibration are shifted downwards and maintains the water flow straightly.

取砂土的过程为：(1)振动头振动松散砂土层，同时向吸砂头供入高压空气；(2)高压空气通过吸砂头从排砂管向上排出的过程中，在吸砂管内产生负压，吸砂管将管口处的水和砂土吸入到吸砂头内，在高压气流作用下，吸砂头内的砂、水和气混合而成的三相流通过排砂管排出到受砂船上；(3)在吸砂的过程中，适时地将吸砂头和振动头下移并保持钻孔套管中的水流畅通。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了