In addition to iron and carbon, list the other elements that may be found in a grey cast iron and describe their effect on the properties of a grey cast iron.
In addition to iron and carbon, list the other elements that may be found in a grey cast iron and describe their effect on the properties of a grey cast iron.
The core is composed of pure nickel and iron.
The core is composed of pure nickel and iron.
Steel is made ______ iron. A: on B: at C: from D: in
Steel is made ______ iron. A: on B: at C: from D: in
Eat as many vegetables as possible, for they are rich ______ iron. A: of B: in C: with D: for
Eat as many vegetables as possible, for they are rich ______ iron. A: of B: in C: with D: for
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 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
—This machine is very big.—Sure it is .It’s made ________ iron. A: from B: by C: in D: of
—This machine is very big.—Sure it is .It’s made ________ iron. A: from B: by C: in D: of
1803a8273f88c11.png 的英文名称是______。 A: iron (II) carbonate B: ferrous carbonate C: iron carbonate D: ferric carbonate E: iron (III) carbonate
1803a8273f88c11.png 的英文名称是______。 A: iron (II) carbonate B: ferrous carbonate C: iron carbonate D: ferric carbonate E: iron (III) carbonate
e. Vitamin C supplements may be combined with iron supplements to increase iron absorption.
e. Vitamin C supplements may be combined with iron supplements to increase iron absorption.
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.
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.
The mass of a single iron atom is 9.3 × 10–23 g. Determine the number if iron atoms in regular cube that measures exactly 10 cm on an edge. The density of iron is 7.86 g/cm3 ( )
The mass of a single iron atom is 9.3 × 10–23 g. Determine the number if iron atoms in regular cube that measures exactly 10 cm on an edge. The density of iron is 7.86 g/cm3 ( )