【正确答案】正确答案： Service industries, equal to tertiary industries, including banking, insurance, tourism, the selling of goods, etc. now produce 65% of the national wealth of modern Britain. (1)A lot of this is domestic activity such as retailing, tourism and so on, but British is also a major international provider of services, accounting for about 10% of the world"s exports of such services. 70% of the UK"s workforce is employed in the service sector. (2)The financial sector is an important part of this service industiy, as London is one of the top three financial centers in the world. It has the greatest concentration of foreign banks in the world, accounting for 20% of all international bank-loans, and is the world"s largest foreign exchange market. (3)As well as banking, dealing in commodities and insurance are important processes in "The City"—the name given to the historic area at the center of London where all this business is concentrated, at the heart of which is the London Stock Exchange, one of the busiest share-dealing centers in the world.