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

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

Steel is not as _____ as cast iron; it does not break as easily.

2. The iron and steel industry ___ the key link in socialist production. Are/is

An iron and steel works, with some satellite factories, ____ to be built here.

Among the major products (import)_________ by Japan were iron and steel, and wood.

Which of the following regions is the center of America’s iron and steel industry?

Among the major products (import )____by Malasia were iron and steel, and medical instruments.

An iron and steel works, with some satellite factories ,__to be built here. A: are B: were C: is D: will

An iron and steel works, with some satellite factories, ______ to be built there. A: are B: is C: will D: need