Rebels being Pushed back by Gaddafi Forces

Libyan rebels are retreating after losing control of three towns along the coast road. The last two cars are fleeing from Gaddafi's heavy weapons. The rebels are on the verge of losing all the ground they gained after coalition attacks on Gaddafi's forces. Gaddafi's army is advancing with heavy weapons, leaving the rebels unable to respond effectively.

How is Gaddafi's army described in the context of the current conflict?

What limitations are the rebels facing in their response to Gaddafi's heavy weapons?