(A) heavy water
(B) concrete and bricks
(C) graphite and concrete
(D) deutrium
(E) graphite
(A) heavy water
(B) concrete and bricks
(C) graphite and concrete
(D) deutrium
(E) graphite
| Share this... |
Facebook
|
Twitter
|
Linkedin
|
Whatsapp
|
Your email address will not be published. Required fields are marked *