简介：Twoexplores(探险者)wereonajunglesafari(远征)whensuddenlyaferocious(凶猛的)lionjumpedinfrontofthem.“Keepcalm,”thefirstexplorerwhispered.“Remeberwhatwereadinthatbookonwildanimals?If

简介：在英文中,名词(noun)有单数(singularnumber)和复数(pluralnumber)之分,如boy和book为单数名词,boys和books为复数名词。代(名)词(pronoun)也有单数和复数之

简介：在英文中,名词(noun)有单数(singularnumber)和复数(pluralnumber)之分,如boy和book为单数名词,boys和books为复数名词。代(名)词(pronoun)也有单数和复数之

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简介：Ltmedisease(Lymeborreliosis)iscausedbythetick-bornespiro-elraeteBorreliaburgdooCeri.Erythemamigrans,anearlyskinlesion,isthemostcommonclinicalpresentation.Theorganismmayspread,causingvariouslatermanifestations.

简介：春季是传染性疾病的高发时段，预防工作一定要做到及时、有效。也许从下面的短文中我们可以得到一些启示！

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简介：Peterjoined(参加)thearmywhenhewaseighteen.Duringthefirstseveralmonthshewastaughthowtobeagoodsoldier.Hedidquitewellineverythingexceptshooting(射击).Onedayheandhisfriendswerepractising(练习)theirshoot-ing,andallofthemweredoingquitewellexceptPeter.

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简介：China'seconomyin2002developedsowellthatwasbeyondmanypeople'sexpectation.Intheverybeginning,manydepartmentsandeconomistsdidnotexpectsomuchresultwouldbemadeineconomicdevelopmentintheyear,believingitmightgrowintheearlystageoftheyearandthendeclineatlast.Butinfact,theeconomykeptgrowingstepbystepinthewholeyear.Andtheeconomicoperationwasalsosuccessful.Then,howtoassessthecorrectnessoftheestimateoftheeconomy?

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简介：ＣｈｉｎａＨａｓａＰｏｐｕｌａｔｉｏｎｏｆ１．２０５８ＢｉｌｉｏｎｗｉｔｈＨｏｕｓｅｈｏｌｄＲｅｇｉｓｔｒａｔｉｏｎＤａｔａｆｒｏｍｔｈｅＭｉｎｉｓｔｒｙｏｆＰｕｂｌｉｃＳｅｃｕｒｉｔｙｓｈｏｗｔｈａｔｂｙｔｈｅｅｎｄｏｆ１９９７，Ｃｈｉｎａ＇ｓｐｏ...

简介：两者都表示“有”的意思,在用法上既有区别又有联系。下面进行详细讲解。一、therebe表示某处或某时“存在、有”某人或某物。它强调的是一种客观存在。在句中的结构是Thereis/are+主语+地点(时间)状语+其他。例如:1.Thereisabirdinthetree.2.Therearemanypeopleatthistimeofday.注1:therebe结构其实是一种倒装句,句子

简介：LastWednesday,AgricultureSecretaryAnnVenemanannouncedthefirstcaseofmadcowdiseaseintheUnitedStates.Atestseemedtoshowbovinespongiformencephalopathy,orB-S-E.inacowfromWashingtonstate.Thenextday,alaboratoryinWaybridge,England,Confirmed(证实）thecase。

简介：Asthmadevelopsinaboutoneadultperthousandpopulationperyear,andepidemiologicalstudiesindicatethatabout10%ofcasescanbeattributedtoexposuresatwork.However,occupationalasthmaisidentifiedlesscommonlythanthisinclinicalpractice;anincidenceof800-1000casesperyearisestimatedbytheUKSurveillanceofWork-RelatedandOccupationalRespiratoryDiseasescheme.Occupationalasthmaiseasilymissedbecause,apartfromitsassociationwithwork,

简介：HeartdiseaseistheleadingkillerofAmericans.Butitkillsmorewomenthanmen.TheAmericanHeartAssociationsaysheartdiseaseandothercardiovascular(心血管的)disorderskillaboutfivehundredthousandwomenayear.Thatismorethanthenextsevencausesofdeathcombined.

简介：ＷＨＡＴＨＡＳＴＨＥＤＡＬＡＩＤＯＮＥＯＶＥＲＴＨＥＰＡＳＴ３６ＹＥＡＲＳ？￥／／ＩｎＡｐｒｉｌ１９５９，ｔｈｅＤａｔａｉＬａｍａｉｓｓｕｅｄｔｈｅ＂ｓｔａｔｅｍｅｎｔｏｆｔｈｅＤａｌａｉＬａｍａ＂ｗｈｉｃｈａｄｖｏｃａｔｅｄ＂Ｔｉｂｅｔｉｎｄｅｐｅ...