甲状腺的功能主要是（）
A.分泌甲状腺素
B.吸收甲状腺素
C.合成甲状腺素
D.吸收和合成甲状腺素
E.分泌和合成甲状腺素
参考答案：E
-What are you going to be when you grow up?
-I'm going to be a . Flying in the sky is my dream.
A．driver
B．pilot
C．pianist
D．cook
