气团可以根据自身温度的差异分为那两种气团？
参考答案：
气团可以根据自身温度的差异分为热气团和冷气团两种。
_____ shouldn’t have part-time jobs because they are too young.
A．Thirteen years old
B．Thirteen-year-old
C．Thirteen-year-olds
D．Thirteen year olds
曾有诗评价扬州酱菜中的酱乳瓜，请背诵这首诗。
