Read "China Sketch (Figure 1) and Russian Sketch (Figure 2)" and answer the following questions. (1) From the perspective of industrial layout, the four major industrial bases in China mainly

: (1) Looking at the map, we can see that the four industrial bases in China are mainly concentrated on the third step of China's terrain; The name of industrial zone A distributed in the European part of Russia is Moscow Industrial Zone;

(2) Russia is rich in mineral resources, many of which are in the forefront of the world, providing favorable conditions for the development of heavy industry and backward light industry. Shanghai-Nanjing-Hangzhou Industrial Base is the largest comprehensive industrial base in China.

(3) Russia is rich in mineral resources, and many minerals rank among the top in the world. Russia ranks third in the world in oil production, second only to the United States and Saudi Arabia, and is known as the "world gas station".

So, the answer is: (1) three; Moscow industrial zone; (2) heavy; Shanghai-Nanjing-Hangzhou Industrial Zone; (3) the total amount is rich, and the per capita possession is insufficient; World gas station.