- 问题详情:Youthinkyouknowyourdog.36.___________Sheprobablyrecognizesyouwhensheseesyou.Butcanadogtellbysimplylookingatyouwhetheryouhaveahappyoranangryexpressiononyourface?ResearchersinAustriahavetaughtpetdogstoknowthedifference. 37.___________Whend...
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