大学英语大学英语大学英语四级(CET4)大学英语四级模拟题20
题目内容

According to the passage, how did Bessemer method make the mass production of steel possible、

2024-07-09

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.

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