查询词典 B. V.

In section one, we introduce some background of the topic, in section two we review some basic and recent results about the structure and hierarchies of the computably enumerable degrees which are closely related to our topic- the algebraic structure of the plus cupping Turing degrees, in section three, we outline the basic principles of the priority tree argument, one of the main frameworks and tools of theorem proving in computability theory, and in section four, we prove a new result concerning the algebraic structure of the plus cupping Turing degrees that there exist two computably enumerable degrees a, b such that a, b ? PC, and the join a V b of a and b is high.

度结合为0′。本篇论文分为4个部分：第一部分介绍了这个领域的一些背景知识；第二部分主要回顾了前人在研究可计算枚举度的结构和层谱时所取得的一些基本和最新结果，这些结果与我们的主题—加杯图灵度的代数结构密切相关；在第三部分中，我们概要的描述了优先树方法的基本原理，此方法是可计算性理论中定理证明的一个重要框架和工具；第四部分证明了一个加杯图灵度代数结构的新结果：存在两个可计算枚举度a，b，满足a，b∈PC，而且a和b的并a∨b是一个高度。

B using press-volume technique, this paper studied the seasonal changes of water potential at saturated point (Ψ, water potential at turgor loss point (Ψ relative osmotic water content at turgor loss point ROWC(superscript thp, relative water content at turgor loss point RWC(superscript tlp, relative content of apoplastic water, bound water/free water V(subscript a/V, and the difference between (Ψ and (Ψ of Reaurnuria trigyna growing on heavy solonchack, non-salinized soil, and saline soil.

运用压力容积技术，研究了4种盐分生境下长叶红砂饱和含水量时最大渗透势Ψ(上标 sat 下标 s、初始质壁分离时的渗透势Ψ(上标 tlp 下标 s初始质壁分离时渗透水相对含量ROWC(上标 tlp、初始质壁分离时的相对含水量RWC(上标 tlp、质外体水的相对含量、束缚水与自由水的比值V(下标 a/V，以及饱和含水量时最大渗透势与初始质壁分离时的渗透势之差的季节变化。

Test results of EMP-steel frictional pairs showed that the wear rate h of EMP, press p andvelocity v are suited to equations separately: h =m .p n and h =a .v b.

试验证明EMP复合材料瓦与钢对磨时的磨损率h与压力p、速度v之间分别满足h=m.pn和h=a.vb关系式，给出了相应系数m、n、a、b的值；磨损率与钢试件表面粗糙度Ra之间满足h=A·RaB关系式，给出了A、B的有效范围值。

He number of TCR V(Vα equal s to 100 and Bβ equals to 30 ) is less than the one of lg Vh (Vh equals to 300),for TCR V is subject to negative selection of major histocompatibility complex according to the neutral theory We discussed that is somatic mutation or DNA rea rrangement the main force in producing antibody diversity and are there pseudoge nes in TCR V or not.

CR V的数目(V α为100，Vβ为30)远少于Ig VH(数目为300)，原因是前者受到主要组织相容性复合体的制约，即受到负选择，这与中性学说观点相一致。文章还讨论了体细胞突变和DNA重排对两类抗体多样性产生上的作用，并探讨了Ig VH和TCR V的假基因问题。关键词分子进化，协同进化，免疫球蛋白，T细胞受体，中性学说

Successful separation of Cd-pheophytin a, Cd-pheophytin b, chlorophyll a, chlorophyll b, pheophytin a and pheophytin b in 14min was firstly accomplished by reversed-phase HPLC at a flow rate of 0.8ml/min, with the mobile phase of methanol: acetone (80: 20, v/v).

首次以甲醇：丙酮＝80：20为流动相，流速为0.8ml/min，在C〓柱（5μm，4.0×250mm）上，14min内成功实现了镉叶绿素a和镉叶绿素b配合物与叶绿素a，b和脱镁叶绿素a，b的高效液相色谱分离。

The study of crystal structure indicates that the complexes belongs to tetragonal,14(1)/a, a=b=27.047(5) A, c=14.103(3) A, a=b=y =90,V=10317(4)A3, Z=16, Dc=1.071g/cm3, F(000)=3408, R,=0.1395, R2=0.1766 and every unit of the tetranuclear complexes is four-coordinated to tridentate ligand and nitrogen atom in pyrazolone from other ligand. The complexes is slightly deformed square-planar geometry.

晶体结构研究表明，该配合物为四方晶系，空间群I4(1)/a，a=b=27.047(5)，c=14.103(3)，α=β=γ=90°，V=10317(4)，Z=16，Dc=1.071g/cm~3，F(000)=3408，R_1=0.1395，ωR_2=0.1766，其结构单元是由一个三齿配体中的ONO和另一个配体吡唑啉酮环二位上的N配位后形成略微畸变的平面四边形构型，其中Cu的配位数为4。

Results: 5~12 Vβ subfamilies were identified in 6 T-ALL cases and 2~18 Vβ subfamilies were identified in 13 B-ALL cases, respectively.

结果：6例T-ALL病人分别表达5～12个Vβ亚家族，13例B-ALL病人分别表达2～18个Vβ亚家族。

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Tz = 2Gk q 即 z = 2Gk q /T 40 Suppose the volume between membrane and the boundary plane is V, and we notice that 2 ∫∫ d x d y = M Then we have Thereby we have q qM V =∫∫ zdxdy =∫∫ dxdy = 2GTk 4GTk M 2 Gk = 2V q /T From τ zx =τ xz =, y z 2Gk τ zx /= y q / T τ z y =τ yz = x 41 Moreover, we get 设薄膜及其边界平面之间的体积为V,并注意到 2 ∫∫ d x d y = M 则有从而有由又可得 q qM V =∫∫ zdxdy =∫∫ dxdy = 2GTk 4GTk M 2 Gk = 2V q /T τ zx =τ xz =, y z 2Gk τ zx /= y q / T τ z y =τ yz = x 42 Adjust the pressure q of which the membrane is under, and make the rights of formulas,, equal to one, then we can gain some conclusions as follows:(1) The stress function of wringed pole equals to the uprightness angle of the membrane (2) The torsion M which wringed pole received equals to two times of the volume between the membrane and the boundary plane.

o b y a x 43 调整薄膜所受的压力q，使得，，三式等号的右边为1，则可得出如下结论：(1)扭杆的应力函数等于薄膜的垂度z。(2)扭杆所受的扭矩M等于该薄膜及其边界平面之间的体积的两倍。

The flame-retardant/smoke-suppressant of PVC may be divided into three kinds. The first is FRs , includes the compounds lying in IVB～VIB, such as TiO〓, V〓O〓, Cr〓O〓 and MoO〓; The second is FRs , includes the compounds lying in VⅡB～IB, such as MnO〓, Fe〓O〓, Co〓O〓, CuO and ZnO. The third is FRs , includes the compounds of subgroup A, for example Mg 〓, Al 〓, Sb〓O〓, carbonate and phosphate.

PVC的阻燃抑烟剂可分为三大类，第一类阻燃抑烟剂为元素周期表中IVB～VIB族的化合物，以TiO〓，V〓O〓，Cr〓O〓和MoO〓为代表，第二类阻燃抑烟剂为元素周期表中VⅡB～ⅡB族的化合物，以MnO〓，Fe〓O〓，Co〓O〓，CuO和ZnO为代表，第三类阻燃抑烟剂为三氧化二锑，氢氧化镁，氢氧化铝等主族元素的化合物。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。