Teaching of speaking is weak in senior middle school mainly because of the neglect of speaking and the lack of appropriate teaching methods. This thesis puts forwards the application of Task-Based Language Teaching (TBLT), which aims at improving students' communicative competence by using language to finish certain tasks.

Teaching of speaking is weak in senior middle school mainly because of the neglect of speaking and the lack of appropriate teaching methods.This thesis puts forwards the application of Task-Based Language Teaching (TBLT),which aims at improving students' communicative competence by using language to finish certain tasks.

According to the characteristics of opencast coal resources and dragline technology system application in China, the structure and shifting step of transport passage are optimized in this paper. Typical coal trans-port passage is analyzed in aspects such as the internal dump occupation, dragline operation efficiency, coal transport distance, upper stripping distance and shifting quantities. The middle passage should be given priority in thick overburden open pit mine because the dragline system is only responsible for part stripping task. According to characteristics of middle passage, the transport passage is divided into par-allel climbing, vertical climbing and horizontal transport. In addition, the transport passage structure optimization model and shifting distance optimization model are established in this paper. The case study in Heidaigou open pit mine shows that, the parallel climbing height is accounted for about 60%of the total height, and reasonable shifting distances of th

According to the characteristics of opencast coal resources and dragline technology system application in China, the structure and shifting step of transport passage are optimized in this paper. Typical coal trans-port passage is analyzed in aspects such as the internal dump occupation, dragline operation efficiency, coal transport distance, upper stripping distance and shifting quantities. The middle passage should be given priority in thick overburden open pit mine because the dragline system is only responsible for part stripping task. According to characteristics of middle passage, the transport passage is divided into par-allel climbing, vertical climbing and horizontal transport. In addition, the transport passage structure optimization model and shifting distance optimization model are established in this paper. The case study in Heidaigou open pit mine shows that, the parallel climbing height is accounted for about 60%of the total height, and reasonable shifting distances of th

目的观察大脑中动脉闭塞(middle cerebral artery occlusion,MCAO)或狭窄的缺血性卒中患者的危险因素及血白细胞(white blood cell,WBC)、红细胞沉降率(erythrocyte sedimentation rate,ESR)和超敏C反应蛋白(high-sensitivity C-reactive protein,hs-CRP)的变化。方法 2005年1月～2011年1月期间北京友谊医院神经内科连续入选符合研究标准的262例缺血性卒中患者,其中98例MCAO(闭塞组)、23例大脑中动脉(middle cerebral artery,MCA)狭窄率70%～99%(重度狭窄组)、60例MCA狭窄率50%～69%(中度狭窄组)和81例MCA狭窄率50%(轻度狭窄组)。比较四组患者的危险因素及入院24h血WBC、ESR和hs-CRP等指标。结果闭塞组、重度狭窄和中度狭窄组糖尿病患病率明显高于轻度狭窄组(P分别为0.008、0.044和0.018),其他危险因素在四组间比较差异均无显著性。闭塞组WBC、ESR和hs-CRP水平均高于轻度狭窄组(P分别为0.005、0.002和0.001);重度狭窄组ESR亦高于轻度狭窄组(P=0.026)。结论 MCA闭塞和重度狭窄的缺血性卒中患者血WBC、ESR和hs-CRP水平高于MCA轻度狭窄患者。

@@@@Objective To analyze the risk factors and the changes of white blood cell(WBC), erythrocyte sedimentation rate(ESR) and high-sensitivity C-reactive protein(hs-CRP) in ischemic stroke patients with middle cerebral artery occlusion(MCAO) and stenosis. @@@@Methods From January 2005 to January 2011, 262 unselected ischemic stroke patients who were admitted to Department of Neurology in Beijing Friendship Hospital were enrolled into our study. It included 98 patients with MCAO(MCAO group), 23 patients with 70%~99% stenosis in middle cerebral artery(MCA)(severe stenosis group), 60 patients with 50%~69% stenosis in MCA(moderate stenosis group), and 81 patients with less 50% stenosis in MCA(mild stenosis group). The risk factors and WBC, ESR and hs-CRP in 24 h after admission were compared among four groups. @@@@Results The proportion of history of diabetes mellitus in the MCAO group, severe stenosis group and moderate stenosis group was significantly higher than that in the mild stenosis

中东呼吸综合征冠状病毒(Middle East Respiratory Syndrome-Coronavirus,MERS-CoV)是继SARS冠状病毒(SARS-CoV)之后发现的一种能引起人严重急性呼吸道疾病且具有高致死率的新型病毒。目前还没有有效的抗病毒治疗药物或疫苗。现已从主要流行的中东地区逐渐蔓延至多个国家,具有全球流行的潜在趋势,引起了世界各国的极大关注及众多的调查研究。本文主要对MERS-CoV的传播源及途径、致病机理和抗病毒药物及疫苗等的研究进展做一综述,以期对研制特异的抗病毒药物及疫苗和实施切实有效的预防及控制措施提供参考。

Middle East Respiratory Syndrome-Coronavirus (MERS-CoV) is a novel coronavirus which can cause severe acute respiratory illness with a high mortality rate .There is no proven medication or vaccine for MERS-CoV .Currently MERS-CoV has spread from the main epidemic area ,the Middle East area ,to many other countries including United States of America and has the potential of global endemic .It has raised global public health concerns regarding the current situation and its future evolution .This review will mainly focus on the research progress of MERS-CoV about the animal reservoir and transmission , infection mechanisms and development of anti-viral drugs or vaccine .The goal is to provide with useful references to the devel-opment of specific drug and vaccine and an effective control and prevention of M ERS-CoV infection .

对于胰腺多中心肿瘤过去多采取全胰切除术,术后不可避免地出现严重胰腺内、外分泌功能障碍,严重影响患者的生活质量.近年来,保留胰腺功能的各种胰腺切除术越来越多地被报道,如中段胰腺切除术、胰头切除术、胰体尾切除术等[1-2],但保留中段的胰腺切除术(middle-preserving pancreatectomy,MPP)罕见报道.我们从2011年1月至2013年3月成功实施2例该类手术,患者术后胰腺内外分泌功能良好.现报道如下并结合文献展开讨论.

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