Nobodyknowswhofirstinventedit,buttheumbrellawasusedinve...
問題詳情：Nobodyknowswhofirstinventedit,buttheumbrellawasusedinveryancienttimes.ProbablythefirsttouseitweretheChinese,backintheeleventhcenturyB.C.Touseitseemssonaturaltoputupanumbrellatokeepthewateroffw...