estimating volatilities and correlations多媒体教学课件.pptVIP

*****Couldyoudomeafavourandturnoffthelight?请帮忙把灯关掉好吗？CouldyoudomethefavourtopickupSamfromschooltoday？今天你能帮我个忙去学校接萨姆吗？Shesnotinfavourwiththemediajustnow.目前她没有媒体的支持。单项填空Manyyoungpeoplelefttheirhometownforbigcities________betterjobs.A．infavourof B．insearchofC．inchargeof D．inhonourof[解析]句意：很多年轻人离开家乡到大城市就是为了找到更好的工作。insearchof“寻找”，符合题意。infavourof“支持”；inchargeof“主管”；inhonourof“为了纪念……”。[答案]B3．fromtimetotime不时；偶尔fromheadtotoe从头到脚fromhandtohand用手传递fromhandtomouth(生活)仅够糊口frommorningtillnight从早到晚fromdoortodoor挨门挨户地Shesellsfresheggsfromdoortodoor.她挨门挨户地推销新鲜鸡蛋。Bothhusbandandwifeareoutofwork；theylivefromhandtomouth.夫妻俩都失业了，他们的生活仅供糊口。完成句子(1)Becausesheisbusywithhergraduationpaper，shevisitsme__________________(偶尔)．(2)Lifeishardforthepeasantworkersandtheyhavetowork________________(从早到晚)．[答案](1)fromtimetotime(2)frommorningtillnight三、经典句型1．ThencamethedisturbingnewsthatDollyhadbecomeseriouslyill.接着传来多莉病重的坏消息。此句中的that引导的从句为同位语从句，that仅起连接作用，无意义。(1)常见的后接同位语从句的抽象名词有：fact，news，hope，truth，idea，suggestion，thought，question，order，problem，belief，fear等。(2)同位语从句常用that引导，也可以由连接代词who，what，whose，which，连接副词how，when，where，why或连词whether来引导。Hehadnoideawhenshewouldcomeback.他不知道她何时会回来。ThethoughtthatLaoLiwouldopenarestaurantinNewYorksurprisedhiswife.老李要在纽约开饭店的想法让他的妻子非常吃惊。HegotamessagefromMr.Johnsonthatthemanagercouldnotseehimthatafternoon.他从约翰逊先生那里得到消息，经理那天下午不能同他会面了。完成句子(1)Hemustanswerthequestion________(他是否同意)．(2)________(有消息传来说)awomaninthecapitaldiedoftheH7N9virus.[答案](1)whetherheagreesornot(2)Wordcamethat2．Itisuselesstocloneananimalifthereisnotenoughdiversityinthegroupforittoovercomeillness.如果某个动物群没有足够的多样性以克制疾病，那么克隆这种动物是没有价值的。Itsuselesstodosth.表示“做某事没有用”，但在Itisnouse/