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關於Afour的百科

Choosethebestanswer(根據短文內容,選擇最恰當的*)Afour-year-oldgirli...
Afour-wheeledrobot,knownasRover,hasbeentestedbyateamatS...
  • Afour-wheeledrobot,knownasRover,hasbeentestedbyateamatS...

  • 問題詳情:Afour-wheeledrobot,knownasRover,hasbeentestedbyateamatSydneyUniversity.Itwasusedtomoveaherdofcowsfromafieldtoadairy(牛奶場).Researcherswereamazedathoweasilycowsacceptedthepresenceoftherobot.Theywerenotdisturbedbyitandthegatheringprocesswascalmand...
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單項選擇。Thereare__daysinaweek. A.four    B.five,   C.seven...