简介：据辽宁出入境检验检疫局介绍，今年1到5月份，辽宁口岸出口玉米300万吨，超出去年全年的玉米出口量，预计全年辽宁口岸玉米出口量可达600万吨。

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简介：河南宝丰县张八桥镇山张村位于丘陵地带，土地贫瘠，全村有300户农民，祖祖辈辈靠种田为生。如今，该村村民在村党支部书记母建立的带领下，一个个都变成了养猪能手，年出栏50头以上的养猪户就有168家。从2003年年初到现在，该村出栏的两万头商品猪全部销往上海，净赚上海人300多万元。

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简介：Theannualseriesofδ13CweremeasuredintreeringsofthreeCryptomeriafortuneidisks(CF-1,CF-2,andCF-3)collectedfromWestTianmuMountain,ZhejiangProvince,China,accordingtocross-datingtreeringages.Therewasnoobviousdecreasingtrendoftheδ13CannualtimeseriesofCF-2before1835.However,from1835to1982thethreetreeringδ13Cannualseriesexhibitedsimilardecreasingtrendsthatweresignificantly(P≤0.001)correlated.Thedistributioncharacteristicsofascatterdiagrambetweenestimatedδ13CseriesofCF-2frommodelingandtheatmosphericCO2concentrationextractedfromtheLawDomeicecorefrom1840to1978wereanalyzedandacurvilinearregressionequationforreconstructingatmosphericCO2concentrationwasestablishedwithR2=0.98.Also,atestofindependentsamplesindicatedthatbetween1685and1839thereconstructedatmosphericCO2concentrationusingtheδ13CseriesofCF-2hadacloserelationshipwiththeLawDomeandSipleicecores,withastandarddeviationof1.98.ThegeneralincreasingtrendofthereconstructedatmosphericCO2concentrationcloselyreflectedthelong-termvariationofatmosphericCO2concentrationrecordedbothbeforeandaftertheIndustrialRevolution.Between1685and1840theevaluatedatmosphericCO2concentrationwasstable,butafter1840itexhibitedarapidincrease.Givenalongerδ13Cannualtimeseriesoftreerings,itwasfeasibletorebuildarepresentativetimeseriestodescribetheatmosphericCO2concentrationforanearlierperiodandforyearsthatwerenotintheicecorerecord.

简介：两年前，因大学本科毕业后却回乡养猪，让四川农业大学毕业生龙波、王旭名噪一时。8月22日，记者再次走近龙波、王旭时，欣喜地获知这两个靠东挪西借10万元起家的大学生如今身家已超过300万元!