Question

preliminary has the same or almost the same meaning as: introductory revolutionary contemporary satisfactory

Explanation:

"Preliminary" means something that is done or produced before the main part of something. "Introductory" also means serving as an introduction. "Revolutionary" means involving or causing a complete or dramatic change. "Contemporary" means living or occurring at the same time. "Satisfactory" means acceptable. So "introductory" has the same or almost the same meaning as "preliminary".

Answer:

introductory