Wouldyouliketospendyourvacationtravelingbyballoon（氣球）？T...
問題詳情：Wouldyouliketospendyourvacationtravelingbyballoon（氣球）？ThefirstballoontriptookplaceinFrancein1783.Itlastedonlyeightminutes. AboutayearlaterAmericanandaFrenchmandecidedtocrossthechannel.(海峽)...