In world economy， the G7 refers to those seven countries with the world's largest developed economies — France， Germany， Italy， Japan， the United States， the United Kingdom， and Canada， — all of which are trade powers of the world.。（ ）

The economy of is the ___ largest national economy in the world and is the world’s second largest developed economy.（ ）. A: third B: first C: last D: second

The economy of the United States after 1952 was the economy of a well-fed, almost fully employed people.

As an economic and technological giant in the world, the United States ranks first in such advanced fields as computers, ______ , nuclear energy, and electronics. A: mining B: space technology C: insurance D: banking

( ) is the first country to propose the “low-carbon economy” in 2003. A: Denmark B: The United States C: China D: The United Kingdoms