- 问题详情:A.Theycanbeendlesslyimprovedaswebetterunderstandhowtotreatanimals.B.ExpertshavebrokenfreshgroundinbreedingcaptiveanimalsC.YetcriticssuggestthatanimalsshouldnotbekeptincageD.Studieshaveclearlyshownthatcaptiveanimalswilllivelongerandbemoreactiv...
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