根据首字母、中文或英文提示，写出下列单词

小题1:My father is an          (工程师). He works in a factory.

小题2:There are many        (参观者)in the town.

小题3:Daniel is wearing a blue T-shirt. He looks ________ (酷).

小题4:Tokyo is the c       of Japan.

小题5:You can enjoy the          (very clean or cool)air in the country.

缺碘所致的甲状腺肿大属于：（）

A.过再生性增生

B.再生性增生

C.甲状腺肥大

D.内分泌障碍性增生

E.甲状腺增生合并肥大