Grammatically, they are not the same question. They are using different tenses, past and present, on the word "is". The main purpose, though, is the same. They both want to know the most important industries in Venice today.
The most important industries in Venice, Italy today are glass making and the naval industeries.
glass and naval industries
food markets and buildings
food markets and buildings
architecture, art, and glass work
Your mom was a very important industry becasue she made alot of money off the streets corners (a.k.a She was a hooker)
Alaska's three most important industries are oil, tourism, and fishing. Other industries in Alaska are coal, gold, and mining.
one of Poland's most important industries is coal mining.
The most important service industries in Europe is the banking and insurance
Service and manufacturing industries. Our World Today
Agriculture
In the early days when the first industries were being built, most people thought the more industries that were built, the worse your industry would do. But with today's economy it's a good thing to have had those early industries to show us how supply and demand are some of the most important parts of industry today.