According to the passage, how did Bessemer method make the mass production of steel possible
A: It directed air at melted iron in a furnace, removing all impurities.
B: It slowly heated iron ore then stirred it and heated it again.
C: It changed iron ore into iron which was a substitute for steel.
D: It could quickly find deposits of iron ore under the ground.
A: It directed air at melted iron in a furnace, removing all impurities.
B: It slowly heated iron ore then stirred it and heated it again.
C: It changed iron ore into iron which was a substitute for steel.
D: It could quickly find deposits of iron ore under the ground.
举一反三
- The main social services of the iron and steel industry system are the provision of iron and steel products and the consumption of iron ore A: 正确 B: 错误
- The iron ore is one of the chief exports of( ).
- ( ) is not a kind of major bulk. A: iron ore B: phosphates C: bauxite D: cement
- Iron and steel are flexible. But they are not as flexible ______ rubber. A) as C) to B) for D) by A: Iron and steel are flexible. But they are not as flexible ______ rubber. B: as C: for D: to E: by
- Which of the following regions is the center of America’s iron and steel industry?