科创中国

二语词汇习得中的石化现象直接阻碍了学习者的语言表达及运用能力.二语习得者如果过分地依赖于高频词汇,结果则是其产出性词汇无论在广度还是深度上都很难进一步提高.因此,教师应该鼓励并在教学中采用一定的教学策略促使学生尽量多运用刚学的新词,而非一味依赖以往熟知的高频词汇,使学生的语言表达更加准确、恰当和丰富,从而促进其英语水平的不断提高.

中国石化为了提升HSE管理水平,研究开发了中国石化HSE管理系统.阐述了系统的设计思想和理念,并介绍了系统的结构设计和功能设计,以及系统的实施策略.应用情况表明,通过使用该系统促进了HSE管理的系统化、标准化、制度化,使企业管理人员动态掌握HSE管理现状,提高了管理效率,降低了管理成本.

文化的传播需要一定的载体.体育传播是以竞技比赛、体育活动、娱乐休闲等为载体的交流和信息交换行为.我国古代体育文化总是附着于军事、竞技游戏以及养生健身、侠义精神以及宗教仪式等特定的社会现象中继承和传播的.

Fear?and?anxiety?may?be?adaptive?responses?to?life-threatening?situations,?and?animals?may?communicate?fear?to?others?vocally.?A?fundamental?understanding?of?fear?inducing?sounds?is?important?for?both?wildlife?conservation?and?management?because?it?helps?us?understand?how?to?design?repellents?and?also?how?(and?why)?animals?may?be?negatively?impacted?by?anthropogenic?sounds.?Nonlinear?phenomena--sounds?produced?by?the?desynchronization?of?vibrations?in?a?sound?production?system-are?commonly?found?in?stress-induced?animal?vocalizations,?such?as?in?alarm?calls,?mobbing?calls,?and?fear?screams.?There?are?several?functional?hypotheses?for?these?nonlinear?phenomena.?One?specific?hypothesis?is?the?unpredictability?hypothesis,?which?suggests?that?because?nonlinear?phenomena?are?more?variable?and?somewhat?unpredictable,?animals?are?less?likely?to?habituate?to?them.?Animals?should,?therefore,?have?a?prolonged?response?to?sounds?with?nonlinear?phenomena?than?sounds?without?them.?Most?of?the?studies?involving?nonlinear?phenomena?have?used?mammalian?subjects?and?conspecific?stimuli.?Our?study?fo-?cused?on?white-crowned?sparrows?(Zonotrichia?leucophrys?ssp.?oriantha)?and?used?synthesized?acoustic?stimuli?to?investigate?behavioral?responses?to?stimuli?with?and?without?nonlinear?phenomena.?We?predicted?that?birds?would?be?less?relaxed?after?hearing?a?stimulus?with?a?nonlinear?component.?We?calculated?the?difference?from?baseline?of?proportion?of?time?spent?in?relaxed?behaviors?and?performed?pair-wise?comparisons?between?a?pure?tone?control?stimulus?and?each?of?three?experimental?stimuli,?including?a?frequency?jump?up,?a?frequency?jump?down,?and?white?noise.?These?comparisons?showed?that?in?the?30q50?s?after?the?playback?experiment,?birds?were?significantly?less?relaxed?after?hearing?noise?or?an?abrupt?frequency?jump?down?an?octave?but?not?an?abrupt?frequency?jump?up?an?octave?or?a?pure?tone.?Nonlinear?phenomena,?therefore,?may?be?generally?arousing?to?animals?and?may?explain?why?these?acoustic?properties?are?commonly?fou

日前,燕山石化公司采用氢调法成功开发出高流动均聚K1860、K1885聚丙烯产品,特别是K1885,其熔融指数高达100g/min,是普通均聚产品的几倍,为国内首创.据悉,K1860、K1885聚丙烯产品主要用于快速成形薄壁制品.由于其具有流动性大,可塑性强的特点,

如今,报知春节迫近的已经不再是腊八粥的香味,而是媒体上充满压力的热火朝天的春运了.每入腊月,春运有如飓风来临,很快就势头变猛,愈演愈烈;及至腊月底那几天,春运可谓排山倒海,不可阻遏.每每此时我都会想,世界上哪个国家有这种一年一度上亿人风风火火赶着回家过年的景象?

西门子公司工业自动化业务部于2012年3月20日宣布,向中国石化扬子石油化工股份有限公司(简称扬子石化)提供用于废水处理的Zimpro湿式空气氧化(WAO)系统.WAO系统用于处理石化生产中的含硫碱渣废水,可

我们经常遇到这样的情况,学生在学习物理知识时轻松、愉快,学习兴趣浓厚,可在解决实际问题时,往往一筹莫展,束手无策.究其原因是,在教学中重知识轻能力、学不致用.这种反差现象使我意识到:学生仅仅是懂得了物理知识还不足够,还要培养学生应用知识解决实际问题的能力,特别是知识迁移的能力.学生在学习过程中通过举一反三、触类旁通,把学到的某些物理原理、物理知识应用到学习新的知识或解决问题的活动中去,这就实现了知识的迁移.

药用薄膜专用低密度聚乙烯(LDPE)(牌号为Q281D)是中国石化上海石油化工股份有限公司(简称上海石化)近期投入工业化生产的新产品.与普通LDPE相比,该产品具有正己烷提取物低的特点,符合GB 9691-1988中有关正己烷提取物的限量要求.专业药品包装材料生产厂家用该产品制成的薄膜,经上海市食品药品包装材料测