¿en que organo se realiza el intercambio de gases?​

Which answer best completes this dialogue? sr. gómez. —hola paco. ? qué hora es? —son las nueve de la ma? ana.

Hola, susana. pablo. ¿qué tal? answer for blank 1:

Based on the text, what is a similarity among the schools in colombia and spain? private schools require uniforms. directors decide the school attire. there are three types of school uniforms. girls can choose to wear pants or skirts.