单管的

Normal working hours, B2-B1 between the need to add a positive voltage, E-B1 between the PN junction forward biased if the Canadian single-junction transistors that turn, after turn-on, E-B1 between the resistance will soon be reduced, to B2-B1 between the current rapid increase in current increase, so that the resistance between the E-B1 further reduced, so the formation of a strong positive feedback.

正常工作时，B2—B1间需加正电压，E—B1间的 PN结若加正向偏置，单结晶体管即导通，导通后，E—B1间的电阻会很快降低，使B2—B1间的电流迅速增加，电流的增加，又使E—B1间的电阻更进一步的减小，如此形成了强烈的正反馈。

The inactivation efficiencies of spark gap switch pulse source and thyratron pulse source matched with reactors were compared. In addition, the effects of humic acids on both PEF and NTP inactivation were studied. The results revealed that the NTP was more prone to be affected by organic compound.

其次，以饮用水为研究对象，系统的考察了PEF和NTP消毒时，单脉冲能量的影响和连续流条件下的杀菌效果，比较了火花隙开关电源和闸流管开关电源与反应器匹配的杀菌效果，研究了天然水体中存在的腐殖酸对PEF和NTP杀菌效果的影响，结果表明水中的有机物对NTP杀菌的影响很大。

With the development of single moleculer manipulation.Much research work has been done on DNA by optical tweezer, magnetic tweezer, micropipe, and so on. All these work has opened a new area in molecuer biology.

随着单分子操作的实验技术的发展，人们通过光镊、磁镊、微吸管等等，研究DNA分子的力学性质，探索DNA与蛋白质的相互作用，为分子生物学的研究开辟了新的天地。

It is the first time that these phenomena were observed: Two nuclei are surrounded by plasma and locate at the central of the female gametophyte and the others nuclei are positioned at the fringe of the female gametophyte; Before the pollen tube enters the female gametophyte. the nuclei in chalazal end begin splitting of plasma and form multinuclear cell.4. The pollens of Gnetumc are spherical or applanate with single aperture. The ornamentation of exine is spine. The basis part of spine is lenience and the top part of spine is tip or obtuse sphere.

首次在买麻藤属植物的雌配子体中观察到2个游离核位于配子体的中央位置，且被一团原生质所包围的，其余的游离核位于边缘的现象以及花粉管进入雌配子体前，合点端的核已经发生胞质分裂形成多核细胞的现象 4、买麻藤的花粉近球形或扁平型，有单萌发孔，外壁表面具小刺状纹饰，小刺基部宽大，末端尖或钝圆。

The results show that longer treatment time will lead to partial defunctionalization, and higher microwave power (higher than 900 W) can reduce the functionalized degree by removing some initially-attached functional groups.

结果表明：过长的反应时间会导致部分的去功能化的发生，而过高的微波功率(大于900瓦)，则会将单壁碳纳米管上起初键连上的十一烷基剥落下来。

Although there is fair evidence that articial disc replacement is similarly effective compared to fusion for single level degenerative disc disease and that an interspinous spacer device is superior to nonsurgical therapy for 1- or 2-level spinal stenosis with symptoms relieved with forward exion, insufcient evidence exists to judge longterm benets or harms.

尽管已有相当的证据证明人工椎间盘置换治疗单节段脊柱退变疾病具有和融合手术类似的疗效，也有相当的证据证明棘突间支架治疗1～2个节段伴间歇性跛行的椎管狭窄的疗效优于非手术治疗，但以上都缺乏长期随访的证据。

In this part, the densities of sodium benzoate, sodium nitrobenzoate, sodium chlorobenzoate and sodium methylbenzoate in DMFwater mixed solvents have been measured at 298.15K with an Anton Paar Model 55 densimeter. From these densities, apparent molar volumes and partial molar volumes have been calculated, transfer volumes from water to DMF-water mixtures and substituent contributions to the transfer volumes have also been obtained. Solvent and substituent effects are discussed in detail. The Scaled Partical Theory has been applied to the ternary solutions to evaluate the partial molar volumes of cavity formation and the volumes change associated with solute-solvent interaction.

选择了含有取代基团的芳香类有机电解质，主要是苯甲酸钠、硝基苯甲酸钠、氯苯甲酸钠和甲基苯甲酸钠的邻、间、对同分异构体作为研究对象，用DMA 55型振荡管密度计测定了它们在不同质量百分数组成的DMF-水混合溶剂中的密度，利用这些密度数据，计算了表观摩尔体积和偏摩尔体积，得到了这些单取代苯甲酸钠从水到DMF-水混合溶剂中的迁移偏摩尔体积及苯环上不同位置的取代基对迁移偏摩尔体积的贡献值，讨论了溶剂效应和取代基效应，并将定标粒子理论应用于此三元电解质溶液中。

Eastern city eastern machine stake work machinery plant is professional to design to make the piling machine of diesel oil and the type piling hammer of guide bar of diesel oil, stake machine product has DD1, DD2, DD4, DD6, DD12, DD18, DD25, DD32, DD40, DD53, DD63, DD73, DD83, DD93, DD108 and DD120 to wait for the series type piling hammer of guide bar of diesel oil, basis the requirement of customer design production the series that form a complete set with the machine hammer of piling machine go to pipe rack and step Lu frame , with caterpillar frame, as well as various series, speed speeds , electro-hydraulic press , only two letter hoists, include Q841 and C268K of the extensive application of the former Soviet Union Jiao vehicle and various series in hole vibration hammer.

东台市东机桩工机械厂专业设计制造柴油打桩机和导杆式柴油打桩锤，桩机产品有DD1、DD2、DD4、DD6、DD12、DD18、DD25、DD32、DD40、DD53、DD63、DD73、DD83、DD93、DD108、DD120等系列导杆式柴油打桩锤，根据客户的要求设计制造与打桩机机锤相配套的系列走管架、步履架、和履带架，以及各种系列、快慢速、电液压、单双简卷扬机，包括前苏联广泛应用的C268K、Q841铰车和各种系列的中孔振动锤等。

We Heng Bo seamless materials experts believe that the current spot price of iron ore sea freight has been greatly raised, the three major mines in the spot market, a large number of shipping vessels, Brazil and Australia to China sea-freight demand also hit the market this year a new high, this is already much higher than the price of a long single.

我们恒博物资的无缝管专家认为，目前的铁矿石现货价格被海运费大大抬高，三大矿山在海运即期市场大量买船，巴西、澳洲到中国的即期市场海运费也创下今年以来的新高，这已经远远高于长单价格。

Based on four project cases of vibro casing cast-in-place pile in silty sand foundation, the liquefaction of sand and its consequent pile breaking are analyzed, and suggestions on how to adopt value s of the design parameters of a single pile are presented.

摘要以4个在粉砂地基中均采用振动沉管灌注桩的工程为例，分析了施工中砂土的液化及由此引起的断桩，并对单桩设计参数的取值提出了建议。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。