What does it mean when it is said that the federal courts exercise both exclusive and concurrent jurisdiction?

What are the 4 main reasons to provide information

List 3 impacts wwii had on canada.

Why are slanted roofs found on many buildings within russia and finland? a. to prevent ice slides. b. to prevent the build-up of water during heavy rains. c. to prevent heat from escaping during the clod winter months. d. to prevent snow build-up.