简介：看完电视节目之后,观众可以马上反馈信息。这种双向的电视交流已不再是梦想。Communicationbytelevisionhasbeenone-waysinceitsbeginning.Howev-er,thetelevisionwatcherwillsoonbeabletotalkback.Two-waytelevisionisnowapossibility,makingelectroniccom-municationagoalforthefuture.Becauseofcomputersandcabletelevision,theaudiencewillsoonbemorethanwatchers.Theywillbeabletodomorethanchoosetheirprograms.Theywillalsobeabletogivefeedbackonthem.Two-wayTVisnotadream.Thehard-warefors...

简介：红十字会是一个国际性的志愿救援团体。你知道是谁最先想到成立这样一个组织的吗?美国红十字会的情况又是怎样的呢?TheRedCrossisaninternationalorgani-zationwhichcaresforpeoplewhoareinneedofhelp.AmaninaParishospitalwhoneedsblood,awomaninMexicowhowasinjuredinanearthquake,andafamilyinIndiathatlosttheirhomeinastormmayallbeaidedbytheRedCross.TheRedCrossexistsinalmosteverycountryaroundtheworldRedCrossoriginationsaretimescalledtheRedCrescent,theRedMogenDavid,theSunandtheRedLion.Theideaofforming...

简介：为了使人们更多地了解地震的危害性,美国政府正在花费大量的资金致力于寻找两个问题的答案。这两个问题是什么呢?他们具体的做法又是什么呢?TheU.S.governmenthasrecentlyhelpedpeoplelearnmoreaboutthedan-gersofearthquakesbypublishingamap.Thismapshowsthechancesofanearth-quakeineachpartofthecountry.Thear-easofthemapwhereearthquakesaremostlikelytobreakoutarecalledearthquake“belt”.Thegovernmentisspendingagreatdealofmoneyanisworkinghardtohelpdiscovertheanswertothesetwoquestions:1.Canweforetellearthquakes?2.Canw...