首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 31 毫秒
1.
从词性、句法功能、句中的位置、意义以及结构等方面对“用”与“w ith”进行比较,认为“用”与“w ith”在词性、句法功能、句中的位置上有同亦有异,在义项上,“w ith”远比“用”多得多。  相似文献   

2.
HY061是一种简单实用的瞬间成型语音集成电路。用它设计构成的PC机语音板、不需任何存储器及单片机控制电路,语音清晰,电路简单并可组合多段语音输出,完全满足工业监测中需要输出语音的要求。  相似文献   

3.
大蒜浸提液对辣椒种子发芽和幼苗生长的影响   总被引:1,自引:1,他引:0  
王存纲  张素娟 《安徽农业科学》2009,37(15):6938-6939
[目的]探讨大蒜素在蔬菜育苗上的应用效果,为无公害蔬菜生产培养壮苗寻找新的途径。[方法]用不同浓度的大蒜浸提液处理辣椒种子,研究大蒜浸提液对辣椒种子发芽和幼苗生长的影响。[结果]对照种子的发芽高峰出现在第4天,发芽种子41粒。25和35ml/L大蒜浸提液处理的种子在第4天只有2粒发芽,其发芽高峰出现在第6天。5和15彬L大蒜浸提液处理的种子的发芽高峰出现在第5天。25和35ml/L大蒜浸提液处理的种子的发芽势分别比对照降低2,4.1%和32.9%。15、25和35ml/L大蒜浸提液处理的种子的发芽指数分别比对照降低22.1%、25.7%和28.3%。大蒜素处理对辣椒幼苗的延长生长有一定的抑制作用,对加粗生长有一定的促进作用。[结论]大蒜素对辣椒种子发芽有一定的抑制作用,对辣椒幼苗生长有一定的促进作用。  相似文献   

4.
Speech perception in infants   总被引:18,自引:0,他引:18  
Discriminiationi of synthetic speech sounds was studied in 1- and 4-month-old infants. The speech sounds varied along an acoustic dimension previously shown to cue phonemic distinctions among the voiced and voiceless stop consonants in adults. Discriminability was measured by an increase in conditioned response rate to a second speech sound after habituation to the first speech sound. Recovery from habituation was greater for a given acoustic difference when the two stimuli were from different adult phonemic categories than when they were from the same category. The discontinuity in discrimination at the region of the adult phonemic boundary was taken as evidence for categorical perception.  相似文献   

5.
本文从词汇、结构、修辞等几方而对英语中经常出现的肯定陈述强调这一语言现象进行了较为全而的阐述,并总结了介入一些英语肯定陈述强调的特点及规律。  相似文献   

6.
简约是语言历时演变的一种趋势。本文对英语简约语言现象加以阐述,包括对词法,句法,修辞等不同层面简约样态的分析,并通过语例描写总结了语言表征简化的特点。  相似文献   

7.
It has been found that with an oscilloscope driven through a simple network of two resistors and two capacitors it is possible to produce recognizable pictures from speech sounds. These pictures thus become a natural phonetic alphabet, with which both standard pronunciation and the nuances of dialect and accent can be represented. While a given speech sound has certain invariant characteristics, it has also an overlay of accent, which can be represented in the alphabetic character. It is suggested that the technique may be useful in teaching deaf children to speak.  相似文献   

8.
翻译是一种跨文化的交流活动,不同语言间的差异不仅表现在语音、词汇和句法上,更表现在其文化特色上。翻译中,常常会出现两种语言文化的“杂合”现象。把握杂合度,采取恰当的翻译策略,有助于改变文化“杂合”中的失衡现象。  相似文献   

9.
Resolving the frequency components of complex sound spectra including speech is an inherent, important accomplishment of the auditory nervous systems of vertebrates. The critical perceptual unit in the frequency domain, the critical bandwidth, has a simple functional equivalent within the principal midbrain auditory nucleus--the central nucleus of the inferior colliculus.  相似文献   

10.
教师只有掌握正确的吐字发音方法,做到字正腔圆,利用普通话语音圆润悦耳的音色和抑扬顿挫的音调讲课,才能收到以声传情,声情并茂的表达效果,使学生在学习知识抽时,得到语言美的享受。  相似文献   

11.
农业科技论文的英文摘要在语法方面有不少特点,本文着重论述其中的八个特点。他们是:句子的主语多采用第三人称表达;使用的语态决定于所表达的内容;谓语动词往往用一般现在时或一般过去时;词汇尽量选用词义单一表达准确的书面用词;不用多余的修饰词语:一般不用间接问句;所用的句型富于变化,有表达力,以求引起读者的阅读兴趣;虚拟语气使用的场合比普通文章要多。  相似文献   

12.
紫茎泽兰化感作用对6种贵州本地植物种子萌发的影响   总被引:2,自引:1,他引:2  
为了解紫茎泽兰对贵州本地植物种子萌发的影响,以紫茎泽兰作为供体,选取6种植物种子作为受体,采用培养皿滤纸法测定紫茎泽兰叶片浸提液对贵州本地植物种子萌发的化感作用。结果表明:紫茎泽兰化感物质对马尾松、苣荬菜各发芽参数和杉木胚根生长呈现出低促高抑的现象,而对其他几种受体表现为抑制作用,随着浸提液浓度的升高,对各受体的抑制作用显著增强。各受体植物种子萌发对紫茎泽兰化感作用的敏感程度不同,马尾松、苣荬菜、油茶对紫茎泽兰的化感物质的抑制作用不敏感,杉木、板栗、火棘则较为敏感。  相似文献   

13.
The hypoglossal motor neurons that innervate the vocal organ (syrinx) of the male zebra finch show a selective, long-latency (50-millisecond) response to sound. This response is eliminated by lesions to forebrain song-control nuclei. Different song syllables elicit a response from different syringeal motor neurons. Conspecific vocalizations may therefore be perceived as members of a set of vocal gestures and thus distinct from other environmental sounds. This hypothesis is an avian parallel to the motor theory of speech perception in humans.  相似文献   

14.
通过实验室模拟,研究不同含量外源有机质存在下(5%、10%和15%),钙铝交互作用(钙/铝摩尔浓度比为1∶2、1∶1和2∶1)对茶园土壤铝的吸附能力和活性的影响。结果表明,钙铝交互作用显著增加了茶园土壤对铝的吸附量,外源有机质对钙铝交互作用下茶园土壤铝的吸附作用影响不明显;钙铝交互作用使茶园土壤水溶态铝含量增加,交换态铝含量下降,且随钙/铝比的增大交换态铝含量下降越显著;但外源有机质使钙铝交互作用下茶园土壤的水溶态铝含量下降,同时交换态铝含量显著增加。总的看,外源有机质使钙铝交互作用下茶园土壤活性铝含量增加,且随外源有机质含量的增加,活性铝含量增加的越显著。  相似文献   

15.
Japanese quail can learn phonetic categories   总被引:2,自引:0,他引:2  
Japanese quail (Coturnix coturnix) learned a category for syllable-initial [d] followed by a dozen different vowels. After learning to categorize syllables consisting of [d], [b], or [g] followed by four different vowels, quail correctly categorized syllables in which the same consonants preceded eight novel vowels. Acoustic analysis of the categorized syllables revealed no single feature or pattern of features that could support generalization, suggesting that the quail adopted a more complex mapping of stimuli into categories. These results challenge theories of speech sound classification that posit uniquely human capacities.  相似文献   

16.
【目的】研究转Bt Cry1Ac基因棉花外源基因漂移规律,为转基因棉花生态安全性评价提供依据。【方法】2014年在吐鲁番市和2015年在库尔勒市,利用小区试验种植转基因棉花,翌年利用卡那霉素抗性检测结合分子检测的方法检测外源基因的漂移。【结果】在距离转基因棉花小区边缘1~120 m均能检测到含有外源基因Cry1Ac。SGK321种子漂移率最大漂移率是向南方向距离转基因棉花小区边缘1 m处,漂移率为5 %;GK19最大漂移率是向西方向达到了10.09 %。以方向因素和距离因素建立Cry1Ac基因漂移Logistic回归预测模型,方向和距离对种子漂移都有显著影响(P <0.05),但方向和距离两个因子并不能最终决定外源基因的漂移率。【结论】转基因棉花外源基因漂移率受方向和距离的影响,但最终决定外源基因的漂移率,并不是方向和距离联合作用的结果。  相似文献   

17.
隐喻在汉语中经历了"字词——句子——篇章"的扩张过程,"隐喻对偶句"的形成至关重要。隐喻对偶句分"解释性隐喻对偶句"和"构成性隐喻对偶句"两类。想象图式的一致性与语言形式的一致性是隐喻对偶句形成的基础。隐喻对偶句有很强的再生性,其形成过程是一种"跨句子的语法化"。  相似文献   

18.
Two methods are described for preparing cytoplasmic extracts from sea urchin embryos. One method, involving homogenization, yields DNA structures that cosediment with polyribosomes and subribosomal ribonucleoproteins. In addition this method also yields extraneous structures containing RNA that cosediment with polyribosomes. The DNA is not associated with polyribosomes, as shown by buoyant density analysis. Furthermore, this DNA appears to be spurious, because its release into a cytoplasmic extract does not occur when a different method of cell disruption, involving passage of embryos through a hypodermic needle, is used. With this second method, polyribosomes are obtained without extraneous cosedimenting RNA structures and subribosomal ribonucleo-proteins are obtained in the virtual absence of DNA.  相似文献   

19.
汉英句子结构最主要的区别在于意合与形合。意合与形合是两种语言不同的组织特点,各有其深厚的文化传统。汉语注重话题,英语注重主谓,汉语的话题句侧重于语义结构,英语的主谓句侧重于语法结构。汉语句子中动词十分丰富,英语句子只能有一个谓语动词。本 文《红楼梦》及其英译本中的句子为例,分析比较汉英两种语言因句法结构之差异在翻译中所产生的不对应性。  相似文献   

20.
主题句是作者对段落主题的评价或总结。主题句的功用在于让读者对作者所要表达的观点有一个大概了解,用来表达段落的中心思想。主题句在段落的位置比较灵活,随意性较大。主题句所要陈述的内容包括:"为什么"和"怎么样"等问题。写作主题句应当做到句子完整,内容清晰、具体,措辞得当,所表达的论点能够统揽全段。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号