heqiongsophie 2008-5-1 11:24
上来就找了个难的类来听写,勇气可嘉!:D
素不相适 2008-5-1 17:49
第28 天地理11篇
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Since we've been discussing alternative fuels [color=red]lately[/color][color=red] [/color]I want to pass [color=red]on to[/color] you some information I read[color=red] about[/color] a new feul [color=red]that's been in the[/color] news a lot lately .It's called A-21.9XS.M8pa
It 's composed of water and a [color=red]chemical [/color]know as [color=red]naphtla(石脑油)[/color] .It seems to be a very [color=red]promising(有希望,有前途)[/color] fuel because it's much cleaner[color=red] than the gasoline[/color] that we use today .That 's not to say that is it doesn't[color=red] pollute[/color] ,but it is cleaner . A-21 isn't like some other [color=red]alternative[/color] fuels that requrie completely new[color=red] types of engines(发动机)[/color] .A-21 still works in[color=red] minor(较小的,次要的) mechanical(机械的) modification(更正) [/color].So changing over [color=red]wouldn't [/color]big deal .
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You may[color=red] doubt[/color] some of these [color=red]claim[/color] as many researcheras have some people feared that it contains 45 percent water it would freeze in the winter . But a small amount of [color=red]antifreeze(防冻剂)[/color] was [color=red]add to it[/color] and that seems to [color=red]have sloved[/color] the problem .p$|GL{[B
A-21 has recently [color=red]undergone [/color][color=red]street tests in[/color] buses in Reno Nevada .So far it seems to work just fine . This is a good thing especially in Nevada .Because the State goverment there has pass a law requiring that[color=red] a large percentage of vehicles[/color] in Nevada [color=red]run on(涉及)[/color] native fuels A-21 should help.
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这片刚才一不小心删了:L ,无奈我又打了一遍, 我现在都有点佩服自己了。因为我是个没有毅力和耐心的人,做事还马虎:( 。不管干什么都没有坚持下来过,这是第一次坚持这么长时间,有人说21天就能形成一个习惯, 我会加油的,不管结果如何,看过自己留过的汗水, 我很会感到很欣慰的:) 。似乎说得有点早,呵呵!加油。:loveliness:
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ps :今天和妈妈狂逛了3个小时,结果向开运动会时的哪都痛,缺乏锻炼阿, 我妈口头禅都变成你时间行吗?街也没逛好,上哪几乎都是奔去的,再不干这样事,好好学习吧!
素不相适 2008-5-1 23:10
[size=2]第29天地理12篇风-H$?T%dFz
[font=Times New Roman] The wind of a [color=deepskyblue]tornado[/color] are the most violent anf [color=red]destructive(破坏性的)[/color] [color=darkgreen]ones [/color]on Earth [color=darkgreen].Any of you[/color] [color=red]who have [/color]seen one [color=red]knows[/color] [color=darkgreen]very well[/color] how frightening and powerful they are .[color=red]What's [/color]interesting about them is that scientists [color=red]don't actually[/color] know exactly why tornadoes occur.[/font]
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[font=Times New Roman] We do know ,however what happens when tornadoes are formed .As you remember a front occures when cool [color=red]dry air[/color] from the [color=red]north [/color]meets warm [color=red]humid[/color] air coming from the [color=red]sourth[/color] from the Gulf of Mexico(墨西哥海湾) for tornadoes in the United State [color=red]where these[/color] air[color=red] masses(大量)[/color] meet a [color=red]narrow zone[/color] of [color=red]storm[/color] clouds developes and[color=red] thunderstomers(雷暴)[/color] and sometimes tornadoees occure[/font]#P1w2rIm#u7\?
[font=Times New Roman] How is this violent [color=red]weather[/color] produced?Well a mass of warm[color=red] humid[/color] air [color=red]rises [/color]very [color=deepskyblue]rapidly [/color][color=red].As it [/color]rises(发生,出现) more warm air[color=darkgreen] rushes(冲)[/color] in to [color=red]raplace [/color]it .This [color=red]inr[/color]ushing air also rises and in some cases especially when there is [color=red]extrem thermal instability{不稳定)[/color] begins to [color=red]rotate[/color] when it happens the rotating air forms a tornado[/font]0OD8vQGi YwJM(C'E
[font=Times New Roman] Even if you 've [color=red]seen[/color] tornadoes [color=red]only[/color] in movies you know that they can demolish(破坏) buildings in seconds .This is possible because when a tomado pass over a house ,it [color=red]sucks up(吸收)[/color] air from around the house and so the air [color=red]pressure [/color]ourside the house[color=red] drops[/color] rapidly .Inside ,pressure remain the same .So air pressure inside is greater than the pressure outside .The result is that the building [color=red]explodes(使爆炸) outward[/color] .Next we'll talk a little bit about how new technological developments are being used to [color=red]try to predict[/color] tornadoes.[/font]
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[[i] 本帖最后由 素不相适 于 2008-5-1 23:21 编辑 [/i]]
Horse 2008-5-2 00:27
红色的词都很重要
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