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After 13 months culture, sporophytes began to form. Each gametophyte had several archegonia, and only one sporophyte was produced per gametophyte. The first sporophyte frond was simple and had pinnate venation.

抱子在经13个月的培养后开始产生,每个配子虽然有许多的藏卵器,但只产生一株孢子,第一片孢子的叶片为单叶羽状脉。

It is laborious to draw stereogram by hand,and especially difficult to draw stereogram of body with complicated structure.

针对手工绘制视图工作量大,而且不适宜绘制复杂形视图的问题,将视投影理论和三维几何造型结合起来,利用计算机绘制视图。

The fluid inclusions of Shalagang antimony are composed of gas and liquidfacies. The composition of gas facies is CO2 and vapor, and the liquid facies is brinesolution. The homogeneous temperature of inclusions is between 135℃~290℃,according to the forming temperature of stibnite. And the salinity of inclusions is0.53~12.58wt%NaCl.

沙拉岗锑矿床流包裹以气液两相为主,气相成分为CO2和水蒸气,液相成分为盐水溶液;包裹均一温度在135℃~290℃之间,与辉锑矿形成温度相吻合;包裹盐度变化为0.53~12.58wt%NaCl,总属低温低盐度包裹

For the coordination of multiple agents in noncooperation environment, we considered the learning aim as finding a Nash equilibrium strategy through in learning function taking other agent's actions into account. Therefore, we expended the single agent Q-learning algorithm into multiagent Q-learning algorithm. In addition, we proved the convergence of multi-agent Q-learning algorithm under certain general sum stochastic game architecture for only one Nash equilibrium or multiple same Nash equilibrium.

对于非合作环境下的多智能协调我们通过在学习函数中考虑了智能的联合行动,提出把学习目标作为求取一个Nash平衡点策略,这样将单智能Q-learning算法扩展到多智能的Q-learning算法;证明了在一定的一般和随机对策结构下具有一个或多个相同Nash平衡点条件下多智能Q-learning算法的收敛性。

In the present experiment, the screening techniques for salt tolerance and mutants of strawberry leaf and anther callus in vitro were studied, and primary screening system for salt tolerance evaluation was established. It was studied the sensitivity to mutagen of different strawberry cultivars and different tissues in vitro.

本试验以草莓离叶片及花药愈伤组织为试材进行了耐盐突变的诱变及筛选研究,初步建立了草莓耐盐突变诱变筛选的技术系,研究了草莓品种以及离组织对诱变剂的敏感性,并且对不同诱变处理再生植株的耐盐性差异进行了比较。

A young specimen must be fed at a rate of a young cricket or a young cockroach one to twice per week, and an adult or subadult specimen can be fed at a rate of an adult cricket, a locust or a subadult cockroach every week or every two weeks.

必须每周投喂一到两次若虫蟋蟀或者幼蟑螂。成和亚成可以每周或者每两周投喂一只成蟋蟀、蝗虫或者亚成蟑螂。

The Yushulin oilfield is located in eastern slope of Sanzhao seg of central sag zone in the northern part of Songliao basin. Its main oil-producing formations are Fuyu and Yangdachengzi oil layers of mesozoic group cretaceous. Its reservoir is fluvial facies sediment. Main sandstone is positive circle channel sandstone with calcium in the beneath, and microelectrode curve is box distribution function. Its secondary oil-producing formation is Yaoyi part of Putaohua oil layer. Its reservoir is delta front sediment. Main sandstone is subaquatic distributary channel sandstone, and microelectrode curve is box distribution function.

榆树林油田处于松辽盆地北部中央坳陷区三肇凹陷东部斜坡,主要产油层系是中生界白垩系泉三、四段的扶余、杨大城子油层,储层为河流相沉积,主要砂为有底钙存在的正旋回河道砂,微电极曲线形态为箱型;其次为姚一段的葡萄花油层,储层为三角洲内前缘沉积,主要砂为水下分流河道砂,微电极曲线形态为箱型。

There are two kinds of spinels in a granulite terrain of Yushujgou, South Tianshan Mountain. One occurs in the intermediate and basic granulite units and is characterized by enriched Al and poor Cr, belonging to Al_spinel. In thin sections it shows dark green color and subhedral to anhedral form, and coexists with other metamorphic minerals, suggesting a neogenic metamorphic mineral of granulite facies. The other occurs in the adjacent ultramafic rock unit, belonging to Cr_spinel. In thin sections, it is dark brown in color and is scattered among olivine, clinopyroxene and orthopyroxene as irregular grains, indicating a stable residual mineral in the process of granulite facies metamorphism.

新疆榆树沟麻粒岩地中发育两类尖晶石:一类见于中、基性麻粒岩中,其化学成分富 Al贫 Cr ,属铝尖晶石,镜下为深绿色,呈半自形至他形粒状,与其它变质矿物共生,表现为麻粒岩相的新生变质矿物;另一类发育在空间上与麻粒岩紧密相邻的超镁铁质岩中,为铬尖晶石,镜下为深褐红色,呈不规则粒状分布于橄榄石、斜方辉石和单斜辉石之间,为麻粒岩相变质过程中稳定的残余矿物。

However the addition order of tartrate and phosphate on activity of enzyme adsorbed by goethite produced the greatest impact.

表面类型(硅氧烷表面或羟基化表面)及阴离子配对胶表面负电荷的贡献量在酶的吸附及活性保持中的重要性;B阴离子配后加入时酶的吸附量一般比配先加入时的高;C)配加入顺序对二氧化锰的影响最显著,对砖红壤和高岭石的居中;对针铁矿的次之;对黄棕壤的最小。D)乙酸或草酸加入顺序对高岭石上固定化酶比活性的影响最大,而酒石酸或磷酸则对针铁矿影响最大。

Mutants related to shoot branching are isolated in pea? Arabidopsis? petunia? rice? tomato and maize, such as revoluta? pinhead? monoculm1(moc1)? lateral suppressor? blind/torosa related to axillary meristem initiation; more axillary growth? ramosus? decreased apical dominance associated with axillary meristem outgrowth; supershoot/bushy? Teosinte branched1 (Tb1) contacted with axillary meristem initiation and outgrowth.

在豌豆、拟南芥、矮牵牛、水稻、番茄和玉米中获得到很多与分枝发育相关的突变,如与腋生分生组织的形成有关的revoluta、pinhead、monoculm1(moc1)、lateral suppressor、blind/torosa等突变;与腋生分生组织的生长有关的more axillary growth、ramosus、decreased apical dominance等突变;与腋生分生组织的形成和生长都有关的、supershoot/bushy、teosinte branched1(tb1)等突变

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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.

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