|
The material which does not have fixed melting point is |
|||||||
|
(a) |
plastic |
(b) |
metals |
(c) |
glass |
(d) |
ceramics |
|
The material which does not have fixed melting point is |
|||||||
|
(a) |
plastic |
(b) |
metals |
(c) |
glass |
(d) |
ceramics |