You're more on top than on the desk? The intermediate examination or the final examination is getting closer? You want to go comfortably go through the material and time to test how would you cut the check? With the roof Training of DDH no problem.
Over 500 questions from Specialized engineering, economics and social studies and general knowledge wait answered it to be. In the learning mode you choose one of the three themes and practicing playing what you need to know later on the roof.
In test mode you test your pitch: 25 questions in 5 minutes on all topics. Share your results with your friends then. Who is the best apprentice in the class?