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You’veprobablyheardofworkingdogsthathelppoliceofficers,...
问题详情:You’veprobablyheardofworkingdogsthathelppoliceofficers,orhorsesthathelpfarmers.Didyouknowthatcarrierpigeons(信鸽)canbetrainedtohelppeopletoo?Herearesomeexamples.MailmanCarrierpigeonscanbetrai...