四体的

The determination of lead content in naphtha by graphite furnace atomic absorption spec-troscopy was studied with tetrahydrofuran as solvent, nickelous nitrate as matrix modifier and suitable amount of iodine solution added in samples.

将试样用四氢呋喃稀释，加入适量碘溶液，以硝酸镍为基体改进剂，研究了用石墨炉原子吸收光谱法直接进样测定石脑油中的铅含量。

Based on the data analysis of casting lamella, scan electron microscope and reservoir pressure, the mechanism of secondary pore of the beach-bar sandstones are researched in the upper Es4 of the Palaeogene in Boxing Sag .

根据砂岩铸体薄片、扫描电镜、地层压力分析，研究了博兴洼陷沙四上亚段滩坝砂岩次生孔隙的形成机制。

Autotetraploid rice IR36-4X was treated with ion implantation of low energy nitrogen ion beams and a polyembryonic seedling mutant IR36-Shuang was identified in M2 generation.

以低能氮离子束为诱变源，对同源四倍体水稻品系&IR36-4X&进行离子注入，在其第2代群体内筛选得到了1株具有多胚苗性状特征的突变株（IR36-双）。

Nineteen strains of Chlamydia psittaci were isolated from aborted foetus of goats and sheep in Aksu,Tacheng,and another two counties and identified or tested by election microscopy,drug sensitive test,and virulence test for chicken embryos.

并从阿克苏、塔城等四个地州的山、绵羊流产胎儿中成功地分离出19株鹦鹉热衣原体，鉴定方法采用电镜、药敏试验、鸡胚毒力试验等6种方法，较系统、全面。

Objective To establish a tissue culture system of Pueraria thomsonii and to cultivate a new breed autotetraploid.

目的建立粉葛的组织培养体系；培育粉葛同源四倍体新种质。

Polyamic acidsolution were synthesized from pyromellitic dianhydrideand 4,4"-diaminodiphenylusing solution polycondensation with N,N"-dimethylacetamideas a solvent.

采用均苯四甲酸酐和4，4＇-二氨基二苯醚作为单体，合成聚酰亚胺的前驱体聚酰胺酸。

Polyimide/silica (PI/SiO2) nano-hybrid films of different solid content were prepared based on pyromellitic dianhydride and 4, 4'-oxydianiline using tetraethoxysilane as the inorganic precursors.

以均苯四甲酸二酐和4，4'-二氨基二苯醚为有机单体，正硅酸乙酯为无机前驱体，制备了SiO2含量一定，PAA杂化胶液固体含量不同的PI/SiO2纳米杂化薄膜。

Fruit smooth, strongly 4-angled, with 4 bands of white trichomes separated by glabrous replum and valve midveins

果平滑，强烈四棱形，白色毛状体条纹状的具4 以无毛假隔膜和裂爿中脉分开 9 E。

In the research of molding performance of MIM feedstock, for the shortcoming of capillary rheometry, it was propounded that using spiral mold test molding performance of feedstock, and a set of spiral mold was creatively designed with quickly exchange gates and closed mold cavity.

不锈钢模芯零件充模仿真分析表明，由于熔体流动的&跑道效应&，采用单浇口注射成形两侧流动严重不平衡，端面四个波峰和波谷明显，中部芯柱出现欠注，并发现该零件中间芯轴处成形最困难。

The four-colour offset printing press Heidelberg, if a printing plate surface is a zinc or zinc or iron, iron will and Bailers in acid solution from chemical replacement reaction secable, nitrous oxide, drum body cannot ¤j¤?¤? backing and a printing plate, such as the drum surface long soaked in the acid corrosion, instilla secable, a printing plate chrome coated drum for restructuring into it or nickel does not result in more accidents.

四色海德堡胶印机，如果印版滚筒暗地是涂锌或铁，那么锌或铁城市与水斗溶液边的酸起化学置换不正答生锈、氧化，滚筒体不克不及紧贴衬垫物和印版，如滚筒背恒久泡在酸液边，会爆发腐化生锈，印版滚筒体改成涂铬或镍不离不会爆发以上变乱。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。