Maybe you heard Russians say "open book", "close door". The explanation of that fact is simple. There are no grammatical articles in the Russian language.

No articles in Russian language
open	the	book
открой	-	книгу
close	the	door
закрой	-	дверь
I have	a	sister
у меня есть	-	сестра
This is	a	table
Это	-	стол