Nobodyknowswhofirstinventedit,buttheumbrellawasusedinve...
问题详情：Nobodyknowswhofirstinventedit,buttheumbrellawasusedinveryancienttimes.ProbablythefirsttouseitweretheChinese,backintheeleventhcenturyB.C.Touseitseemssonaturaltoputupanumbrellatokeepthewateroffw...