a Animal medical center made a study of 132 cats over a period of five months这句话的 over a period of five months到时是在为期5个月内还是为期超过5个月啊?over a month 不是超过一个月吗

古文:山川之美答案fen cen a fen si cen medical an useful animal?还是a useful animal? an animal还是a animal说明为什么? an animal doctor还是a animal doctor cen是什么意思? a cunning animal a cunning animal a conning animal a medical biologist 请翻译成中文 How to register a medical applance company? animal animal animal _______horse is a useful animal . a kind of wild animal Man is a ___ animal. what a cute animal 是什么意思