阴性

Results showed that β-catenin was positive expression in stellate reticulum,inner dental epithelium,and dental sac at cup stage,in inner dental epithelium,dental papilla cell,and cell nucleus at early bell stage,in cervical loop and cusp cell membrane at late bell stage,and in ameloblast and odontoblast cell at amelogenesis stage.

结果表明，帽状期在星网层、内釉上皮、牙囊均为细胞核阳性表达；钟状早期在内釉上皮、牙乳头细胞核阳性表达；钟状晚期在颈环、牙尖细胞膜阳性表达；成釉期早期在成釉质细胞、成牙本质细胞阳性表达；成釉期晚期均阴性表达。

Results The seven isolates were rod-shaped, Gram-negative, obligate anaerobe, and spores formation was not observed.

7株菌株细胞形态均为杆状，不产芽孢，革兰氏阴性，严格厌氧，在70℃生长良好。

The third fluroquino is one kind of antibiotics which is often used in ophthalmology. It's antibacterial activity for Gram-negative bacteria is better than that for Gram-positive bacteria and it is the weakest for anaerobe and endo-pathogens.

第三代氟喹诺酮类药物是眼科常用的抗菌药物，它对革兰氏阴性菌有良好的抗菌活性，但对革兰氏阳性菌(如肺炎球菌、化脓性链球菌、肠球菌)的抗菌作用相对较弱，对厌氧菌和胞内病原体(衣原体、支原体、军团菌、分枝杆菌)作用较差。

The third fluroquino is one kind of antibiotics which is often used in ophthalmology. Its antibacterial activity for Gram-negative bacteria is better than that for Gram-positive bacteria and it is the weakest for anaerobe and endo-pathogens.

第三代氟喹诺酮类药物是眼科常用的抗菌药物，它对革兰氏阴性菌有良好的抗菌活性，但对革兰氏阳性菌(如肺炎球菌、化脓性链球菌、肠球菌)的抗菌作用相对较弱，对厌氧菌和胞内病原体(衣原体、支原体、军团菌、分枝杆菌)作用较差。

Results: Against most of gram-negative bacteria and anaerobe, pipercillin/sulbactam showed stronger activity than that of ampicillin/Sulbactam and pipercillin.

结果： 哌拉西林/舒巴坦对产酶革兰阴性需氧菌及厌氧菌的体外抗菌活性均高于哌拉西林和氨苄西林/舒巴坦；哌拉西林与舒巴坦的不同配比对其抗菌活性影响不大；哌拉西林/舒巴坦对临床常见产酶菌的MIC和MBC非常接近。

Analogously, parameters of sub-cluster of Chinese herbs are obtained.

本文通过群子统计参数，分析了现今抗艾滋病的高频中药，其结果表明这些高频药有两类：一是有抗艾滋病病毒的阴性药；二是提高免疫力的阳性药；继而从分析中得出特殊单味药的规律，即r：和rZ均大的中药，具有良好的抗艾滋病功能。

Abstract］ objective to study the pathological features and histopathological type and differential diagnosis of hepatic focal nodular hyperplasia.methods the clinicopathological characteristics of 40 cases of fnh were studied.all were evaluted by use of paraffin embedded sections and he staining before light microcope observation.results there were 28 females and 12 males fnh patients whose age were from 16 to 62 years（median 41.3）,all alpha-fetoprotein was negative and had no hepatitis history.25 cases were classic type showed characteristic central stellate fibrotic scar,composed of fibrous connestive tissue and tortuous blood vessels.8 cases were telangiectic type,the left were mixed type and adenomatoid type.conclusion fnh is a reactive proliferation of hepatic cells to local blood vessel anomalies,it is not realy a tumor.its differential diagnosis includes hepatic adenomatous hyperplasia nodule,hepatic anaplasia nodular hyperplasia,fibrolamellar hepatocellular carcinoma and hepatocellular adenoma.

目的 探讨肝局灶性结节性增生的病理形态特点、组织分型及鉴别诊断。方法分析40例肝局灶性结节性增生的临床资料，并采用石蜡包埋he染色光镜下观察其组织学特点。结果 40例肝局灶性结节性增生患者中，女28例，男12例，年龄18~62岁，平均年龄41.3岁，所有病例术前均无肝炎病史，甲胎蛋白阴性，组织学上25例为经典型，有特征性的中央纤维瘢痕，由纤维结缔组织及扭曲血管组成。8例为毛细血管扩张型，其余为混合型及腺瘤样增生型。结论肝结节性增生是一种肝细胞对局部血管的异常反应性增生，并非真性肿瘤，主要与肝腺瘤样增生性结节、肝间变性结节状增生、肝纤维板层癌及肝细胞腺瘤鉴别。

There were four fetal deaths and one anencephalus in B19-DNA positive group. There was no fetal deaths or congenital malformation in B19-DNA negative group.

其中在67例B19 DNA阳性者中，发生4例死胎和1例无脑儿，在268例B19 DNA阴性者中，无一例发生死胎和胎儿畸形，阳性与阴性者间比较，差异有显著性(P.05)。

Three groups were trendelenburg position and were at an angle of declination by 15,30,45 degree accordingly.

患者既往均无黄疸、胰腺炎、严重感染及免疫系统疾病史，术前检查心、肺、肝、肾功能均在正常范围，乙肝表面抗原阴性。

Results True positive rate: immature granulocyte, hemoglobin concentration variation, microcyte, left shift, macrocyte, hypochromic erythrocyte, large platelet, blasts, anisocytosis 86.7%-100.0%, hyperchromic erythrocyte 69.2%, nucleated red blood cell, atypical lymphocyte, platelet clumps

结果 真阳性率：未成熟粒细胞、血红蛋白浓度不等、小红细胞、核左移、大红细胞、低色素性红细胞、大血小板、原幼细胞、红细胞大小不等为86.7%~100.0%，高色素性红细胞为69.2%，有核红细胞、变异淋巴细胞、血小板凝集为13.3%~32.3%；以上所有参数真阴性率为82.8%~100.0%（平均95.0%）。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐