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摘要： 针对初中学生自主学习行为现状,自 2016 年我们滦州市进行了《农村初中学生自主学习性策略研究》的课题申报立项,在整个课题研究过程中,课题组密切和各试点学校党支部、校委会联系,深入研究创建了“?1+5”自主高效学习课堂教学模式。此课堂教学模式以确立学生在课堂中的主体地位为目的,立足于学生个体的自我学习、自我发展、自我实现。“1”即一个中心一导学案 :教师在备课中通过精心设计把课堂内容问题化,编写成导学案;“5”即?学生自主学习、个人展示、学生点评、教师评价、巩固达标五个教学环节。就这个课堂教学模式的运转情况来看,从学生的身上能看到一些可喜的变化 :学生学习兴趣浓厚,具有强烈的求知欲,能够较合理地安排自己的学习活动,能主动去选择一些学习内容。在教学中收集、处理信息能力和学生分析问题与解决问题的能力有了明显提高 , 学生积极地投入 ,?丰富了自身内涵,提高了自身素质。教师在实验中,积极阅读教育专著,注意对各种关于自主学习方面的资料收集,实现资源共享,使自己对教育科研工作充满浓厚的兴趣,促进专业的进一步发展,实现了教师自身素质的提高。学生的自主学习行为明显好转,学生的学业成绩也有了明显通过,近几年,试点学校毕业年级考入重点高中的比例一直高居20% 以上,在滦州市处于前列,考入普通高中以及非毕业年级的成绩也喜人可观。

摘要： 以煤矿为主题,探讨"1+5"安全快速掘进法在煤矿生产中的应用问题.论述中选取案例研究法,以顺和煤矿作为应用研究对象,先对其工程概况进行了一般性说明,然后按照"1+5"安全快速掘进法的应用顺序展开具体叙述.

摘要： Hilbert problem 15 required understanding Schubert's book.In this book,reducing to degenerate cases was one of the main methods for enumeration.We found that nonstandard analysis is a suitable tool for making rigorous of Schubert's proofs of some results,which used degeneration method,but are obviously not rigorous.In this paper,we give a rigorous proof for Example 4 in Schubert's book,Chapter 1.§4 according to his idea.This shows that Schubert's intuitive idea is correct,but to make it rigorous a lot of work should be done.

摘要： BACKGROUND Pancreatic cancer(PC)is a leading cause of cancer related mortality worldwide,with poor survival due to late diagnosis.Currently,biomarkers have limited use in early diagnosis of PC.Macrophage inhibitory cytokine-1 or growth differentiation factor-15(MIC-1/GDF15)has been implicated as a potential serum biomarker in PC and other malignancies.AIM To determine the role of MIC-1/GDF15 in detecting pre-malignant pancreatic lesions and neoplastic tumours in an asymptomatic high-risk cohort part of Australian Pancreatic Cancer Screening Program.METHODS A feasibility prospective single centre cohort study was performed.Participants recruited for yearly surveillance with endoscopic ultrasound(EUS)had serial fasting blood samples collected before EUS for MIC-1/GDF15,C-reactive protein and carbohydrate antigen 19-9.Patients were stratified into five groups based on EUS findings:Normal;pancreatic cysts,branch-duct intraductal papillary mucinous neoplasm;diffuse non-specific abnormalities;and neoplastic tumours.MIC-1/GDF15 serum levels were quantified using ELISA.Participants in whom EUS demonstrated abnormalities but not malignancy were closely followed up with magnetic resonance imaging(MRI)or computed tomography.RESULTS One hundred twenty participants were prospectively recruited from 2011-2018.Forty-seven participants(39.2%)had an abnormal EUS and five participants(4.2%)were diagnosed with neoplastic tumours,three by EUS(two pancreatic and one liver)and two by MRI/computed tomography(breast cancer,bladder cancer),which were performed for follow up of abnormal EUS.Baseline serum MIC-1/GDF15 was a significant predictor of neoplastic tumours on receiver operator characteristic curve analysis[area under curve(AUC)=0.814,P=0.023].Baseline serum MIC-1/GDF15 had moderate predictive capacity for branch-duct intraductal papillary mucinous neoplasm(AUC=0.644)and neoplastic tumours noted on EUS(AUC=0.793),however this was not significant(P=0.188 and 0.081 respectively).Serial serum MIC-1/GDF15 did not demonstrate a significant percentage change between a normal and abnormal EUS(P=0.213).Median baseline MIC-1/GDF15 was greater in those with neoplastic tumours(Median=1039.6,interquartile range=727.0-1977.7)compared to those diagnosed with a benign lesion(Median=570.1,interquartile range=460.7-865.2)on EUS and MRI(P=0.012).CONCLUSION In this pilot study MIC-1/GDF15 has predictive capacity for neoplastic tumours in asymptomatic individuals with a genetic predisposition for PC.Further imagining may be warranted in patients with abnormal EUS and raised serum MIC-1/GDF15.Larger multicentric prospective studies are required to further define the role of MIC-1/GDF15 as a serological biomarker in pre-malignant pancreatic lesions and neoplastic tumours.

摘要： 试验结果表明:15%苄·乙GP是防除水稻田主要杂草的良好药剂,使用推荐剂量40g/667m,对湖南水稻移栽田、抛秧田的主要杂草有较好的防除效果.

摘要： 试验结果表明:15%苄·乙GP是防除水稻田主要杂草的良好药剂,使用推荐剂量40g/667m,对湖南水稻移栽田、抛秧田的主要杂草有较好的防除效果.

摘要： 试验结果表明:15%苄·乙GP是防除水稻田主要杂草的良好药剂,使用推荐剂量40g/667m,对湖南水稻移栽田、抛秧田的主要杂草有较好的防除效果.

摘要： 试验结果表明:15%苄·乙GP是防除水稻田主要杂草的良好药剂,使用推荐剂量40g/667m,对湖南水稻移栽田、抛秧田的主要杂草有较好的防除效果.

摘要： 过敏性寄主枯斑三生烟，半叶或下部两叶上施用１．５℅植病灵（Ⅱ）号乳油后一定时间内，未施药的另半叶或上部叶可产生出对烟草花叶病毒的抗性，处理株的枯斑直径和数目明显小于和小于对照，施药２小时后检测到局部抗性，继之系统抗性增强，１天后达到高峰，然后逐渐减弱，施药后６天作用基本丧失。处理株的枯斑初现期比对照延迟１天左右。

摘要： 过敏性寄主枯斑三生烟，半叶或下部两叶上施用１．５℅植病灵（Ⅱ）号乳油后一定时间内，未施药的另半叶或上部叶可产生出对烟草花叶病毒的抗性，处理株的枯斑直径和数目明显小于和小于对照，施药２小时后检测到局部抗性，继之系统抗性增强，１天后达到高峰，然后逐渐减弱，施药后６天作用基本丧失。处理株的枯斑初现期比对照延迟１天左右。

摘要： 过敏性寄主枯斑三生烟，半叶或下部两叶上施用１．５℅植病灵（Ⅱ）号乳油后一定时间内，未施药的另半叶或上部叶可产生出对烟草花叶病毒的抗性，处理株的枯斑直径和数目明显小于和小于对照，施药２小时后检测到局部抗性，继之系统抗性增强，１天后达到高峰，然后逐渐减弱，施药后６天作用基本丧失。处理株的枯斑初现期比对照延迟１天左右。

摘要： 过敏性寄主枯斑三生烟，半叶或下部两叶上施用１．５℅植病灵（Ⅱ）号乳油后一定时间内，未施药的另半叶或上部叶可产生出对烟草花叶病毒的抗性，处理株的枯斑直径和数目明显小于和小于对照，施药２小时后检测到局部抗性，继之系统抗性增强，１天后达到高峰，然后逐渐减弱，施药后６天作用基本丧失。处理株的枯斑初现期比对照延迟１天左右。

摘要： 本实用新型涉及家具辅助五金技术领域，具体涉及一种可拆装式三合一五金连接件，包括：侧板、隔板、固定件、连接杆、偏心轮和拆装件，所述固定件可拆卸连接在所述侧板内壁面，所述连接杆可拆卸地嵌设在所述固定件内，所述偏心轮嵌设在所述隔板壁，所述连接杆可拆卸地装入所述偏心轮中，转动所述偏心轮固定所述连接件，所述拆装件可拆卸地固定安装在所述偏心轮顶面，所述拆装件固定安装在所述偏心轮表面。本实用新型的有益效果在于：结合了三合一连接件和层板托的优点，杜绝了其缺点，使得隔板与侧板之间的连接更加稳固，并且具有便利的可拆装性，方便更换与修缮。

摘要： 本实用新型公开了一种多个眼镜扳手螺丝刀多合一五金工具，包括眼镜、手柄、镙丝刀批头夹头，眼镜处设有一缺口，可使推杆上下移动，改变眼睛直径大小，手柄圆筒形，外为圆，内为方或六角形，分为两节，前节前端与眼睛相连，后段后端与螺丝刀批头夹头相连，两节的连接杆内有带螺纹，可使推杆，拉杆上下移动，手柄后端设有螺丝刀批头夹，外喇叭口状，内有两片夹片与手柄内拉杆，用来夹持各种批头，本实用新型是通过对眼镜板手眼镜和板手手柄的重新设计，在手柄内加可前后移动推拉杆和螺丝刀批头夹头，使眼镜可变径，又当螺丝刀，结构科学合理，携带使用安全方便，实现了一种工具多种用途，提高了工作效率和存放空间，适合推广使用。