A:有3种以上的生理系统参与维持体内环境稳态
B:人体内环境稳态的失调与外界环境无关
C:人体维持内环境稳态的调节能力有限
D:稳态有利于参与其调节的器官保持机能正常
Ms Jones has worked here for two years. (改为同义句)
Ms Jones has worked here____two years____.