浅谈解决高中男、女生比例悬殊拔河比赛的办法

拔河比赛是深受学生喜爱的一项体育运动,也是增强班级集体凝聚力很好的机会。拔河比赛的规则多数都是采取淘汰赛,淘汰赛需要参加的单位越多前四名的含金量越高。为了增加学生的兴趣,我们苏北多数采取男、女生混合赛,即男生15人,女生10人。高一举行拔河比赛很好组织,然而高二、高三年级因文理分班导致班级男、女生比例悬殊,文科班级的男生有的只有4~5人,理科班级的女生有的只有2~3人,因此就出现了班级男生或女生拔河人数不够的情况。以往都是采取文理科分开比赛（文对文,理对理）,各分成2大组各取前四名,导致一个年级分成两组失去年级的整体性,也很难组织,况且有的学校的文科或者理科的班级太少,有的只有5~6个班,前四名成绩的含金量太低了。通过几年的努力我校研究出了解决这一问题的办法。所以我校近10年探讨文、理科分成一组的办法。

荧光定量聚合酶链反应检测解脲支原体感染的临床意义

目的 采用荧光定量聚合酶链反应 (FQ -PCR)技术 ,准确定量检测待检标本中解脲支原体 (UU)的感染状况。方法 采用FQ -PCR技术 ,检测男女生殖道标本 76 5份 ,并同时用常规PCR技术 ,对比检测了 85例。结果 FQ -PCR检测76 5份标本 ,UU -DNA阳性 2 79份 ,阳性率 36 .5 % ,其DNA平均拷贝数为 2 .4× 10 4。 38例阳性患者治疗两周内复查 ,转阴率仅为 4 4 .7% ,治疗 3w后复查 ,转阴率达 76 % (P <0 .0 0 5 )。常规PCR结果重复检测时 ,2 5例阳性中 2例变为阴性 ,而 6 0例阴性中 4例变为阳性。FQ -PCR结果重复时完全吻合。结论 FQ -PCR检测UU ,具有快速、特异性高、定量准确等优点 ,并可为临床评价疗效提供依据。

理工类大学英语听说课学生学习焦虑调查研究

本文从焦虑入手,总结影响学生焦虑的因素,特别是调查研究不同性别及不同水平学习者外语焦虑表现,通过定量分析和定性分析的方法,经数据采集、分析和整理后,研究发现:学生整体焦虑值为91.74,总体处于低水平略偏上焦虑层次;低分组高于高分组;男生高于女生。研究结果将对我校大学英语听说课和拓展课程提供一定的理论基础。最后,对大学英语听说课教师提出了几点相应的建议。

Relationship Between Beak Morphological Variables and Body Size and Mantle Length of Male and Female Argentine Shortfin Squid(Illex argentinus)

Beak of cephalopod is an important hard tissue. Understanding the morphology of beak can yield critical infor- mation on the role of cephalopods in the ecosystem. The south patagonic stock of the Argentine shortfin squid, Illex argentinus, is not only one of the most important fishing targets, but also one of the most important species in the marine eco-system of the southwest Atlantic. A total of 430 samples ofL argentinus, including 229 females 103-346mm in mantle length （ML） and 201 males 140-298mm in ML, were collected from the area off the Exclusive Economic Zone of Argentinean waters by Chinese squid jigging vessels during February to May 2007. The morphology of their beaks was evaluated. The relationships between beak morphological variables and ML differed significantly among males and females. They could be best described by loga- rithmic functions for females and linear functions for males except for upper wing length （UWL） and lower rostrum length （LRL）, which followed exponential functions in their relationships with ML. The results showed the sexual dimorphism in the relationship between ML and beak morphology for the south patagonic stock ofL argentinus. However, no significant differ- ence was found between males and females in the relationships of beak morphological variables （except for UWL） versus body weight （BW）, suggesting that the relationship between beak morphological variables and BW can be used for estimating the biomass consumed by their predators.

Why women see differently from the way men see? A review of sex differences in cognition and sports

The differences of learning and memory between males and females have been well documented and confirmed by both human and animal studies. The sex differences in cognition started from early stage of neuronal development and last through entire lifespan. The major biological basis of the gender-dependent cognitive activity includes two major components： sex hormone and sex-related characteristics, such as sex- determining region of the Y chromosome （SRY） protein. However, the knowledge of how much biology of sex contributes to normal cogni- tive function and elite athletes in various sports are still pretty limited. In this review, we will be focusing on sex differences in spatial learning and memory -- especially the role of male- and female-type cognitive behaviors in sports.

Hepatocellular carcinoma in Egypt: A single center study over a decade

AIM： To identify the trend, possible risk factors and any pattern change of hepatocellular carcinoma （HCC） in Egypt over a decade. METHODS： All HCC patients attending Cairo Liver Center between January 1993 and December 2002, were enrolled in the study. Diagnosis of HCC was based on histopathological examination and/or detection of hepatic focal lesions by two imaging techniques plus α-fetoprotein level above 200 ng/mL. The duration of the study was divided into two periods of 5 years each; period Ⅰ （1993-1997） and period Ⅱ （1998-2002）. Trend, demographic features of patients （age, gender, and residence）, risk factors （HBsAg, HCV-Ab, schistosomiasis and others） and pattern of the focal lesions were compared between the two periods. Logistic regression model was fitted to calculate the adjusted odds ratios for the potential risk factors. The population attributable risk percentage was calculated to estimate the proportion of HCC attributed to hepatitis B and C viral infections. RESULTS： Over a decade, 1 328 HCC patients out of 22 450 chronic liver disease （CLD） patients were diagnosed with an overall proportion of 5.9%. The annual proportion of HCC showed a significant rising trend from 4.0% in 1993 to 7.2% in 2002 （P = 0.000）. A significant increase in male proportion from 82.5% to 87.6% （P = 0.009）; M/F from 5：1 to 7：1 and a slight increase of the predominant age group （40-59 years） from 62.6% to 66.8% （P = 0.387）in periods Ⅰ and Ⅱ respectively, reflecting a shift to younger age group. In the bivariate analysis, HCC was significantly higher in rural residents, patients with history of schistosomiasis and/or blood transfusion. Yet, after adjustment, these variables did not have a significant risk for development of HCC. There was a significant decline of HBsAg from 38.6% to 20.5% （P = 0.000）, and a slight increase of HCV-Ab from 85.6% to 87.9% in periods I and II respectively. HBV conferred a higher risk to develop HCC more than HCV in period Ⅰ （OR 1.9 vsl.6） and period Ⅱ （OR 2.7 vs 2.0）, but the relative contribution of HBV for development of HCC declined in period Ⅱ compared to period Ⅰ （PAR% 4.2%, 21.32%）. At presentation, diagnostic α-fetoprotein level （≥200 ng/mL） was demonstrated in 15.6% vs28.9% and small HCC （≤3 cm） represented 14,9% vs 22,7% （P = 0,0002） in periods Ⅰ and Ⅱ respectively. CONCLUSION： Over a decade, there was neady a twofold increase of the proportion of HCC among CLD patients in Egypt with a significant decline of HBV and slight increase of HCV as risk factors. α-Fetoprotein played a limited role in diagnosis of HCC, compared to imaging techniques. Increased detection of small lesions at presentation reflects increased awareness of the condition.

Surgical treatment of locally advanced anal cancer after male-to-female sex reassignment surgery

We present a case of a transsexual patient who underwent a partial pelvectomy and genital reconstruction for anal cancer after chemoradiation. This is the first case in literature reporting on the occurrence of anal cancer after male-to-female sex reassignment surgery. We describe the surgical approach presenting our technique to avoid postoperative complications and preserve the sexual reassignment.

Gender Differences in the Cognition About the Changeability of Body

This study examined gender differences in the cognition of the changeability of different parts of the body. The body was divided into six parts： ＂eyes＂, ＂hair＂, ＂upper body＂, ＂lower body＂, ＂facial features＂, and ＂skin＂, and male and female cognition about the changeability of each body part was compared. The participants were 205 undergraduate students （145 female students and 60 male studentsl） enrolled in a university in Japan. The female and male students showed a similarity in their cognition of＂hair＂ as easily changeable and ＂facial features＂ as difficult to change. In addition, there was a difference between the male and female students in the cognition of the changeability of the ＂eyes＂, with the females perceiving a high level of changeability and men, a low changeability. This result suggests that female students believe in the effectiveness of makeup for covering cosmetic flaws of the eye.

Effect of 17α-Ethinylestradiol on the Time Needed for Males and Females of Gammarus tigrinus Sexton, 1939 to Re-couple

The aim of presented study was to determine the behavioural response of precopulatory pairs of Gammarus tigrinus exposed to the 17α-ethinylestradiol （EE2）. It was hypothesized that 17α-ethinylestradiol would increase the time needed for a male to re-capture a female. Hypothesis was tested in a laboratory with 20 precopula pairs exposed to different treatment conditions. Paired animals were exposed to two different compound concentrations of 50 ng·L-1 and 500 ng·L-1. The control and solvent control was artificial sea water and artificial sea water with ethanol （the diluent for EE2）. The couples were tested several times under different experimental treatments. The obtained results indicate that EE2 affects the precopulatory mate guarding behaviour of Gammarus tigrinus. EE2 in concentration of 50 ng·L-1 and 500 ng·L-1 prolonged the time needed for re-pairing. However, relative to the controls only EE2 in concentration of 500 ng·L-1 significantly prolonged the time needed for male-female re-coupling. In summary, EE2 affects the reproductive behaviour of Gammarus tigrinus.

Remission of Abdominal Colic During Enteroscopy by Injecting Vitamin K_3 into Zusanli Acupoint

In 1970s,sedatives or spasmolytics needed to beadministered 30 minutes prior to performingenteroscopy to relieve abdominal colic during theexamination.Owing to the improvement in operatingskills,such drugs are no more used today.However,anumber of patients still suffer from abdominal coliccaused by irritated colon in the process ofenteroscopy.For severe cases,the operator has nochoice but to suspend the examination.To find a