四体

The string quartet is that the instrument being that two is composed of the violin , a handful viola and a handful cello from four pieces of stringed instruments performs combination , their tone colour both unite and be rich in change, be expert in weave the body and refined exquisite lingering charm, four pieces of instruments have and the expressive power big and powerful equally , accord with thought of four west music middle parts habit at the same time, this combination becomes chamber music therefore, being hit by the have most typical ensemble of two or more instrumentalists , each playing one part form, Also become a composer express music thought having imitates a means deep and individuation most .

弦乐四重奏则是由四件弦乐器——两把小提琴、一把中提琴和一把大提琴——组成的乐器演奏组合，它们的音色既统一又富于变化，以细腻的织体和精妙的韵味见长，而且四件乐器均具有强大的表现力，同时又符合西方音乐中四个声部的思维习惯，因此，这种组合成为室内乐中最具代表性的重奏形式，也成为作曲家表达最深刻和最个性化音乐思想的有效手段。文章分析室内乐与弦乐四重奏的基本内容及关系，讨论弦乐四重奏的发展概况，最后探讨了弦乐四重奏的"民族化"及未来发展趋势。

Barley seeds were irradiated with five different doses of 60 Co-γ ray.There were many kinds of chromosome aberration in pollen mother cells,such as bridge,laggards in anaphase I and anaphase II,asymmetrical division in anaphase I and asynchronous division in anaphase II,ring quadrivalent in metaphase I,three pole division and micro-nuclei in telophase I,micro-nuclei in tetrad and some micro-nucleus separates from the tetrad to form polyad.

大麦种子经5种不同剂量γ射线辐照后， M1植株的花粉母细胞出现多种染色体畸变类型，例如后Ⅰ、后Ⅱ中出现桥、落后，后Ⅰ中出现不对称分裂，后Ⅱ中出现不同步分裂，中期Ⅰ出现环状四价体，末期Ⅰ中有三极分裂和微核，四分体中出现微核且有的微核独立于四分体，从而形成多分体。

In geographical distribution, the tetraploids and the hexaploids were continuous, and overlapped with C. saluenensis and C. pitardii.

四倍体与六倍体类型地理分布是连续的，并与近缘的二倍体种怒江山茶、西南山茶重叠分布。

Most primers amplified same bands in diploids, tetraploids and hexaploids. It suggest that D and AB genomes have high homology and D genomes be successfully transferred from diploid to hexaploid.

从供试的绝大多数引物均能在不同倍性小麦中扩增出相同的条带证明了D染色体组和AB染色体组间存在着很高的同源性以及利用二倍体和四倍体小麦杂交人工合成六倍体小麦的真实性。

Specific bands of D genomes and AB genome in four diploids, four tetraploids and four hexaploids, respectively, could be also amplified by means of M70/E5 1 and M711E5 1 primer combinations screened from twenty pairs of AFLP primer combination for test.

对二倍体、四倍体和六倍体小麦各4个材料的DNA进行AFLP扩增，从20对引物组合中筛选出M70/E51和M71/E51两个引物组合能扩增出D染色体组或AB染色体组的特异性带。

E. Miscellaneous Biography and Jottings, according to Taipingguangji, and then makes a contrastives study in the four aspects of space, pattern, literary style and language style.

第二章中，根据《太平广记》的类目，从唐传奇的体制入手，将其分为&杂传体&和&杂记体&两大类型，并从篇幅、文体、格局、语体等四个方面进行了类型比较。

Among these four varactors, two of them are fabricated on n-well and use the p-n junction between n-well and substrate to isolate substrate noise. The other two are fabricated on p-well and surrounded by deep n-well and n-well in order to isolated substrate noise.

这四种变容器中，其中两种生成於n型井上且利用介於n型井与基体的p-n接面隔绝基体杂讯；另外两种生成於p型井上且被深层n型井与n型井所包围以隔绝基体杂讯。

The dimerization is thermodynamically unfavorable by the enthalpy. However, the formations of trimers and tetramers are very favorable thermodynamically even at high (1200 K) temperatures. Comparisons of the thermodynamic parameters of subsequent oligomerization are also given.

由焓变可知，单体形成二聚体在热力学上是不利的，而形成三聚体和四聚体在高达1200 K的温度下是有利的，同时分析比较了后续反应的热力学参数。

Furthermore, the effects of ligands, metal and reaction time on the reaction were also researched, and the process of new ligand-metal catalysis for Diels-Alder reaction was also analyzed according to Evans" square planar mode and Corey"s tetrahedral manner.

我们对影响配体对映选择性能的各种因素，如配体结构、金属离子、反应时间等进行了研究，而且根据Evans的平面四方形模式与Corey的四面体过渡态理论为新配体—金属配合物催化的该反应提出了可能的反应机理，并对产物的优势构型作了理论分析。

In grain-filling stage, the qP values of evolutionary wheats decreased under water stress, while Shan253 and Changwu134 hadn't decreased, indicated that the effect of water stress on the re-oxidation in Q-A of modern wheat was slight, while before this stage, the electron transport from PSⅡto QA restrained by water stress was main factor of photosynthesis non-stomata limitation to modern wheat; The qNP values of hexaploid were higher than diploid and tetraploid wheat, indicated that the ability of using light energy

随小麦由二倍体向四倍体、六倍体及现代小麦进化，表观电子传递速率有增大趋势，其受水分胁迫影响的程度在花前期有加剧趋势，花前期栽培一粒、栽培二粒、普通小麦、陕253和长武134这五种小麦在水分胁迫下表观量子产额的降幅分别为5%、7.47%、14.29%、33.3%和53.49%，光饱和Pn的降幅分别为8.8%、26.14%、23.25%、44.22%和51.29%，光饱和点整体上也是下降的，且这三个指标的降幅随进化程度提高有增大趋势，表明小麦在进化过程中能量转换系统受水分胁迫影响的程度加剧；而在水分胁迫下，小麦的羧化效率和RuBP再生速率也均下降，下降的程

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。