影响实验动物的环境因子有哪些？
参考答案：
①物理环境系统
②化学环境系统
③生物环境系统
④设施环境系统
⑤管理环境系统
⑥营养环境系统
Mrs. Smith has been teaching in a school since she graduated, so she is not __________ to associating with business people.
A．addicted
B．devoted
C．admitted
D．accustomed
淮南三叛
