Features of Black English:Towards a Comprehensive Perspective

In the past,Black English was stigmatized as"bad English".People looked down upon Black English.As the development ofBlack English and the mixture with Standard English,Black English has attracted more and more attention from the world.Its status has beenimproved.Black English,as a kind of ethnic dialect,is finally accepted.People have realized that Black English is just a kind of language vari-ety with its own characters.This article mainly talks about the unique features of Black English from a comprehensive point of view.     

如何上好《中国革命史》之我见

在中国革命史教学过程中，通过师生之间建立副洽的情感关系、教学内容专题化、教学形式与手段多样化.才能提高学生的兴趣，达到最好的教学效果。     

从几次典型战例看中国女排快攻战术的重要性

<正> 洛杉矶奥运会以后,国际女子排坛中、美、日“三足鼎立”已转为中、古、苏“三强争雄”之势,尤其是古巴,对我国女排构成相当大威胁,成为我队的主要劲敌。一系列世界性大赛之后,我国女排几名主力队员相继退役。在这样新的形势下,中国女排应该采用何种对策,坚持     

南充地区桃李资源初报

1988～1989年对南充地区12县(市)开展了全面地桃李资源调查。结果表明,该区桃李栽培历史近千年;桃李各有一个种,64个桃品种(地方品种27个,引进品种37个),30个李品种(地方品种23个,引进品种7个)发现最优良的地方桃品种有白花桃,岳池伏桃2号(伏桃)和红花桃;最优良的地方李品种有营山李、南充桐子李、王黄李、青皮李和黄蜡李。     

湖南半蒴苣苔属一新变种：鬼溪半蒴苣苔

描述了新发现于湖南的苦苣苔科一新变种——鬼溪半蒴苣苔（Hemiboea gracilis Franch. var. guixiensis G. X. Chen, X. M. Xiang et L. T var. nov.）,新变种与原变种纤细半蒴苣苔（Hemiboea gracilis Franch.）在形态上相近,但通过野外调查以及室内鉴定发现,新变种全株茎疏生柔毛,叶两面和叶柄密生硬毛,苞片、花序梗、花梗、花萼和花冠密生柔毛,果尖端疏生柔毛,二者易于区别.     

变跨度隧道施工引起的地表沉降

针对某地铁叉口变跨度隧道的施工方案进行了离心模型试验 ,模拟了隧道采用双侧壁导坑法施工时地表沉降随各开挖步施工的变化规律 ,同时对相接变跨度隧道施工对地表沉降的相互影响进行了模拟试验 ,试验预测了隧道施工中地表沉降的发生、发展、收敛的全过程 ,所得结果对同类工程具有一定的参考价值     

洛阳出土五代宋元瓷器研究

洛阳出土五代宋元时期瓷器品种特别多,除青瓷和白瓷外,还有黑瓷、褐釉瓷、酱釉瓷、兔毫瓷等。在器形上,五代有银扣碗、花边碗、盒、盏托、壶、盆、盂罐、枕;宋代碗的种类更加丰富,还有盘、杯、瓶、缸、高足炉、碟等;元代有碗、盏、瓶、罐、壶。器物装饰方式有刻花、划花、镂空、堆雕、印花、点彩等;纹饰除几何纹外,还有花卉图案、动物图案及人物故事图案等。     

Variety distribution pattern and climatic potential productivity of spring maize in Northeast China under climate change

This study was based on the daily meteorological data of 101 meteorological stations from 1971 to 2000 and the 0.25°×0.25° grid data from 1951 to 2100 simulated by RegCM3 under the future A1B climatic scenario published by National Climate Center,in combination with the demand of climatic condition for maize growth in Northeast China.The trajectory of agricultural climatic resources and the effects of climate change on variety distribution and climatic potential productivity of spring maize in Northeast China under future climate change were analyzed.The main agro-climatic resource factors include:the initial date daily average temperature stably passing 10℃(≥10℃),the first frost date,the days of growing period,the ≥10℃ accumulated temperature,and the total radiation and precipitation in the growing period.The results showed that:(1) in the coming 100 years,the first date of ≥10℃ would be significantly advanced,and the first frost date would be delayed.The days of growing period would be extended,the ≥10℃ accumulated temperature and the total radiation would be significantly increased.However,no significant change was found in precipitation.(2) Due to the climate change,the early-maturing varieties will be gradually replaced by late-maturing varieties in Northeast China,and the planting boundaries of several maize varieties would be extended northward and eastward.(3) There would be a significant change in the climatic potential productivity of maize in Northeast China with the high-value gradually moving towards northeast.(4) It was an effective way to increase the climatic potential productivity of maize by appropriate adjustment of sowing date.     

中街山海域渔业动物群落结构的季节变化

针对2011年中街山海域4个航次调查数据,利用相似性指数和多样性指数,对该海域的渔业动物群落结构的季节性变化进行了分析。结果表明：除秋季甲壳类占优势外,各个季节鱼类均为优势类群;从资源密度值变化情况来看,中街山海域夏季CPUE最高,为51．5kg,h;从各个季节生物优势种类组成来看,优势种种类数达17种,其中绝大部分为鱼类,龙头鱼和棘头梅童鱼为3个季节均出现的优势种,优势度最高的季节为秋季,单物种最高生物量比重为26．5％;冬夏两季生物量优势度略低于秋季,单物种最高生物量比例为26．2％和20．2％;春季生物量优势度最低,最高单种生物量比重仅为16．5％。     

"控梢灵"对龙眼控梢促花效应的初步研究

用不同浓度“控梢灵”处理龙眼枝梢,并对龙眼枝梢生长情况、成花、产量进行调查．试验结果表明：“控梢灵”控梢作用显著,能提高龙眼的成花率,增加产量．连续喷2次“控梢灵”,对适时秋梢,成花率86％．95％．与对照比较增产111．36％～261．02％;对1～5cm的冬梢,成花率80％～90％,与对照比较增产78、41％～296.61％,随着“控梢灵”浓度增加其抑制作用加强,花穗的抑制过强,长度过短,影响产量．冬梢的长度和成熟度对花穗长度、产量有很大影响、“控梢灵”的抑制作用受大气温度、湿度的影响,低温、干旱的冬季抑制作用强,高温、多雨的冬季抑制作用弱。