简介:模型、模拟和对偶熊先平在分析研究自动控制装置或系统时,首先必须建立它的数学模型:在建立模型之后应用于生产实际之前先在实验室中用模拟系统加以研究是必不可少的;如果两个相互模拟的数学模型是属于相同的物理范畴的话,我们又可以用对偶的方法加以研究,这可以大大...
简介:Ⅰ.Choosethebestanswerfroma,d,canddaccordingtothetextsyou’velearntinC.E.BookOne.(15%)1.WhatkindofapersonisIris?(Lesson1)a.Sheisforgetful.b.Sheisverycautious.c.Sheworriesagreatdeald.Alloftheabove.2.AsJaneexplained,Anncouldhavehadfoodinthehotelrestaurantbecause____.(Lesson2)a.thefoodwasexcellentb.itwasverycheapc.everythingwasincludedinthepaekaged.theSpanishfoodwasalmostthesameastheEnglishfood3.Whichcountrymakesthebestpaperintheworld?(Lesson5)a.Canada.b.Sweden.c.Norway.d.Finland.
简介:Ⅰ.GivethefullnameofthefollowinginitialsandtheChineseequivalents.(10%)FDIR&DEDSNYMEXWTOⅡ.Explainbrieflyandclearlythefollowingtermsandexpressions.(20%)riskcapital,licencing,productcycle,serviceseconomy,tradebarriers(tariffandnon-tariffbarriers)Ⅲ.Answerthefollowingquestions.(30%)1.Whydoeseverycountry,atleasteverybigcountry,developortrytodeveloptheautoindustry?2.Howcouldthecapitalinflowofthemultinationalspromotetheeconomyoftherecipientcoun
简介:在交际中,我们常会使用"高于""大于"这样的"A单+于"结构表示比较,其中"于"的功能为引进比较对象。古代汉语中,表示比较义的"A单+于"结构其后的介词宾语"N(或NP)"多为体词性词语或词组;比较的对象包括人、事物等;该结构又可分为差比、异比、等比等类别。现代汉语中,表比较义的"A单+于"结构语法上常作句子谓语的中心成分,可带宾语;语义上,其结构之前的部分为被比较项,其后宾语为比较的参照项或基准项;语用上,体现反义词不平衡性的"A单"和"A单"是否具有"积极性"成为其使用频率高低的影响因素;韵律方面符合双音节韵律词的标准;认知方面体现了重新分析和组块理论。
简介:<正>综合练习A1完形填空(10分)Menfirstmeasuredtime(?)usingastickintheground.Thelengthofthe(?)shadowwould(?)whattimeofdayitwas.(?),theEgyp-tiansusedapillar,(?)asagnomon,andthendevelopedasimplesundial,(?)consistedofastonewithapointeronit.Thestonewasplacedinaneast-westdirection,andtheshadowofthepointershowedthetime.About300BC,aBabylonian(?)Berosusinventedasemi-circularsundial,(?)hemarkedtwelvehours.TheBabylonians,liketheEgyp-