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地热能——地心热的开发利用
白怡然何谓地热
地球的内部非常热,其地心温度大约为4000℃,热能持续不断地在流向地面,从地表辐射出去并消失在太空中。这一表面的平均热能量值为82毫瓦/米2,如果地球的表面积为5.1×1014米2,那么,这种连续不断的热流失率大约为42兆兆瓦(热)。
到达地表的能量多数是很劣质的热,很少被搜集后直接使用[
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WAYBACKINTOLOVE
HaleyBennettasCoraCorman
【歌+视频】http://www.youtube.com/watch?v=Ce_DxJFdgM4
http://www.youtube.com/watch...[阅读全文]
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【古镇西塘】再次唤醒了我对童年的追忆(组图1)因亲友之托,趁回国省亲之际去了一趟嘉兴的七星。没想到七星竟是老家嘉善的近邻,由此思乡之切便一发不可收拾。。。出国二十余载,竟从没机会再亲近一下故土而时时有那么一丝遗憾。故再返七星之余,想方设法找了个理由让人特地放车去了一趟西塘以了夙愿。
西塘此行是在老街进口的那个茶楼开始的,想不到茶[
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一份唯一而特殊的生日礼物
关于“LIFEEXPERIENCE&ADVICE”的感想
女儿终于成人了!二十数载含辛茹苦,人生征途的种种坎坷,尤其是当我遗妻撒手人寰,除了中年丧妻的阵阵隐痛、生意的失意和人生旅途的彷徨之外,仍不得不拖着疲惫、脆弱的身子既当爹又当妈的设法将遭受多种打击的爱女抚养成人,这份心情只有自已才能体会。。。
遗妻含冤谢世了。然活[
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QuebecfirstprovincetomakewintertiresmandatoryThursday,December20,2007|7:24PMETCBCNews
Quebecmotoristswillberequiredtoswaptheirsummertiresforwinteronesstartingnextwinter,underaprovinciallawpassedWednesday.AsofNov.15,2008,driverswillhavetoequiptheirvehicleswithsnowtiresfromthatdayeachyearthroughtoApril15.Theprovinceestimatesthat90percentofvehiclesalreadyusesnowtiresthoughanestimated500,00...[
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【古镇西塘】再次唤醒了我对童年的追忆(组图1)因亲友之托,趁回国省亲之际去了一趟嘉兴的七星。没想到七星竟是老家嘉善的近邻,由此思乡之切便一发不可收拾。。。出国二十余载,竟从没机会再亲近一下故土而时时有那么一丝遗憾。故再返七星之余,想方设法找了个理由让人特地放车去了一趟西塘以了夙愿。
西塘此行是在老街进口的那个茶楼开始的,想不到[
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一份唯一而特殊的生日礼物
关于“LIFEEXPERIENCE&ADVICE”的感想
女儿终于成人了!二十数载含辛茹苦,人生征途的种种坎坷,尤其是当我遗妻撒手人寰,除了中年丧妻的阵阵隐痛、生意的失意和人生旅途的彷徨之外,仍不得不拖着疲惫、脆弱的身子既当爹又当妈的设法将遭受多种打击的爱女抚养成人,这份心情只有自已才能体会。。。
遗妻含冤谢世了。然活着[
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Song:AfterAllThisTime
Artist:SimonWebbe
【歌+视频】http://www.youtube.com/watch?v=EtKw3pv9_PA
Afterall,thebrokenstones
Thatwerethrown,fornogoodreason
Inside,she'slovinghimstill
Afterallthistime
Andthoughherheartbaresthescars
Nosignofhealing,It'sAllright
She'slovinghimstill,afterallthistime.
Ohhyeahh
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Song:Don'tSpeak
Artist:NoDoubt
【歌+视频】http://www.youtube.com/watch?v=welnlg3svTw
Youandme
Weusedtobetogether
Everydaytogetheralways
Ireallyfeel
ThatI'mlosingmybestfriend
Ican'tbelieve
Thiscouldbetheend
Itlooksasthoughyou'relettinggo
Andifi...[
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Song:BadDay
Artist:DanielPowter
【歌+视频】http://www.youtube.com/watch?v=G8QT8vKWZwE
Whereisthemomentweneededthemost
Youkickuptheleavesandthemagicislost
Theytellmeyourblueskiesfadetogray
Theytellmeyourpassion'sgoneaway
AndIdon'tneednocarryin'on
Youstandinthelinejusttohitanewlow
You'refakingasmil...[
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