计算机辅助外语教学模式分析   总被引：1，自引：0，他引：1  

颉颃 《山西农业大学学报(自然科学版)》2006,26(5):75-76

计算机的普及使计算机辅助教学与大学英语课程结合,其教学模式与传统教学有很多不同之处.本文从讲授的模式、个别辅导的模式、探索学习的模式和协作学习的模式四个方面分析鲻了机助外语教学模式.计算机辅助外语教学的多样化学习方式要求教师在教学中是多个角色的综和.多媒体与传统英语教学应该是相辅相成关系,多媒体在英语教学中有着非常重要的作用,有着广阔的发展前景,我们应努力提高多媒体辅助教学的质量.  相似文献   

小果型西瓜新品种——湘育冰晶     

陶抵辉  刘建雄  阮万辉  陈荣  肖军 《园艺学报》2002,29(6):597-601

 ‘湘育冰晶’的母本系由台湾 特小凤! 西瓜中选出的稳定纯合自交系, 父本引自新疆。该品种果实近圆形, 皮薄, 肉质晶黄, 细嫩无渣, 熟性早, 耐低温, 抗性强, 单瓜质量1~ 1. 5 kg, 商品率高。  相似文献   

多胺交联纤维素树脂的合成及吸附性能(Ⅺ)——天然高分子吸附剂研究     

曲荣君  王春华  阮文举  鞠录国 《林产化学与工业》1997,(3)

报道了多乙烯多胺交联的纤维素树脂的合成及其对若干重金属离子的静态吸附性能和吸附机理。研究结果表明，该树脂能有效地吸附Ｃｕ２＋、Ｎｉ２＋、Ｃｏ２＋、Ｚｎ２＋、Ｐｂ２＋，其吸附量可分别达１．２８，１．２４，０．５８，０．６６和０．９９ｍｍｏｌ／ｇ。在ＨＯＡｃ－ＮａＯＡｃ缓冲溶液中可选择吸附Ｃｕ２＋、Ｎｉ２＋等离子而不吸附Ｐｂ２＋。  相似文献   

浅析我国数字图书馆发展的现状及存在的问题     

鲁杭兵 《安徽农业大学学报》2002,(5):125-126

本文介绍了数字图书馆的意义，我国数字图书馆发展的现状以及实施数字图书馆所而临的问题。  相似文献   

Selection of Adequate Species for Degraded Areas by Oil‐Exploitation Industry as a Key Factor for Recovery Forest in the Ecuadorian Amazon     

Jaime Villacís  Cristina Armas  Susana Hang  Fernando Casanoves 《Land Degradation \u0026amp; Development》2016,27(7):1771-1780

One of the requirements for the forest restoration of soils disturbed by the oil‐exploitation industry is that saplings be able to endure soil‐adverse conditions. In this study, saplings of 20 species susceptible to be used in reforestation programs were evaluated for their ability to grow on substrates derived from soils disturbed by petroleum extractions in the Ecuadorian Amazon. Seeds of each species were planted in germination trays. Once seedlings reached 5 cm in height they were transplanted to plastic bags with three treatment substrates: two derived from petroleum‐exploitation activity (soils from mud and drill cutting cells and from areas surrounding oil wells) and a control soil. Plant survival rate, stem height, and diameter were measured on a weekly basis until 14 weeks after transplantation, when we harvested the plants and also measured plant biomass and calculated the Dickson quality index for each species. Oil‐exploitation by‐product substrates impaired the performance of many saplings, with the substrate from mud and drill cutting cells being the one that most affected plant performance. Only saplings of five native species in the Amazon basin—Apeiba membranaceae, Cedrelinga cateniformis, Inga densiflora, Myroxylon balsamum, and Pouroma cecropiifolia—exhibited high or similar Dickson quality index values in all soil treatments and performed better than the rest. The use of these five species in remediation of soils disturbed by petroleum extraction in the Amazon basin could prove important because of their high potential to adapt to these disturbed sites. Copyright © 2016 John Wiley & Sons, Ltd.  相似文献   

中药细胞级粉碎及其发展趋势     

黎冬明  刘成梅  刘伟  阮榕生 《农产品加工．学刊》2006,(3):46-48

细胞级粉碎是一项新兴的物料加工技术。介绍了中药细胞级粉碎的概念、原理、特点、设备及其发展趋势。  相似文献   

冰瓜子的加工工艺研究   总被引：1，自引：0，他引：1  

宋坤明  钟亮  孙汉巨 《农产品加工．学刊》2006,(10):123-125,129

以西瓜子为原料,重点研究炒制时间、卤料的配比、卤液的添加量、薄荷油与包膜剂的配比对冰瓜子质量的影响。为冰瓜子的工业化生产提供理论依据。  相似文献   

小麦产量及主要产量性状演变的分析     

钟声  阮培均 《种子》1995,(6):24-26

该文对１９８３￣１９９４年南方冬麦区小麦良种区域试验毕节试点６轮参试品种（系）的产量及主要产量构成性状的演变进行了分析，结果表明，近期内育成小麦品种的穗粒数和穗粒重均较高，系丰产潜力提高的２个重要因素。灰色关联度分析结果表明，４个产量性状与数量的关联度大小依次为穗粒重〉穗粒数〉亩有效穗数〉千粒重，为小麦高产育种提供重要的理论依据。  相似文献   

Chromosome Studies in the Genus Alstroemeria     

A. Hang  T. Tsuchiya. 《Plant Breeding》1988,100(4):273-279

Chromosomes of 11 cultivars of Alstroemeria were studied to determine their somatic constitutions. Two cultivars, ‘Eureka’ and ‘Zebra’, were diploid (2n = 2×= 16), six cultivars, ‘Yellow King’, ‘King Cardinal’, ‘Mona Lisa’, ‘Appelbloesem’, ‘Pink Triumph’ and ‘Rosita’ were triploid with 2n = 3×= 24, one cultivar, ‘Orange Beauty’ was a hypertriploid (2n = 3×+ 1 = 25), one cultivar, ‘Luciana’ was a hypotetraploid (2n = 4×– 1 =31) and one cultivar, ‘Jubilee’, was true tetraploid (2n = 4×= 32). This result suggests that polyploid cultivars may have more market value in this cut flower, Alstroemeria.  相似文献   

7个籼型水稻细胞质雄性不育系异交性能的研究   总被引：3，自引：1，他引：3  

韩赞平  汪旭东  王彬  牟春红  吴先军 《种子》2004,23(2):17-20

以7个籼型水稻细胞质雄性不育系D62A、D63A、D64A、D23A、G46A、金23A珍汕97A为材料,视珍汕97A为对照,在海南对它们的异交性能进行了研究.结果表明:7个细胞质雄性不育系的颖花开花率从高到低依次为D23A、D63A、D62A、D64A、珍汕97A、金23A、G46A;D62A等6个细胞质雄性不育系的柱头外露率均高于对照珍汕97A;除G46A、金23A外,其余4个的午前花率均比对照珍汕97A高;D62A、D63A、D64A等3个细胞质雄性不育系的平均张颖时间均比对照珍汕97A长,其余三个短于对照珍汕97A.柱头生活力系数大小依次是:对照珍汕97A、D62A、G46A、D63A、D23A、D64A、金23A.异交结实率从高到低的顺序是D62A、D63A、D23A、金23A、D64A、G46A、珍汕97A.  相似文献