我国动植物资源十分丰富，很多农作物和动植物都能在我国找到适合生长的地区，这主要是因为（　　）

日本9.0级地震引发海啸及核泄漏，不少地方出现抢购碘盐的狂潮，用于防护核辐射。精制碘盐是食盐中添加一定量的碘酸钾，医疗专家提醒：由于碘盐中碘含量相对较低，根本起不到预防放射性碘的作用．吃加碘盐防辐射完全不科学，盲目过量吃碘盐或碘片，可诱发甲状腺功能减退、甲状腺肿等疾病．回答下列问题：

    Hi，I'm Betty.I come from Sydney.I'm a student.I eat breakfast at home.And then I go to school at 8：30.Classes start at 9：00.After school，I usually play sports with my friends.On the weekend，I often take a dancing class and play music.Sometimes I watch TV and read books.

    My favourite season is summer.Because Christmas is in summer.In Australia，summer is from December to February the next year.I usually go to the beach and swim on Christmas Day.What about you?