【Description】The topic of this unit is “character”. New words“姐姐、妹妹、老师、学生” and personal pronouns “我,你,她,他”are included. Sentence pattern“是”and interes …
Utility to monitor the water parameters of one or more aquariums.The parameters monitored are:Temperature G.H., P.H. KH, Nitrite, Nitrate, Ammonia, Ca …