A．It directed air at melted iron in a furnace, removing all impurities.B．It could quic
A. It directed air at melted iron in a furnace, removing all impurities.
B. It could quickly find deposits of iron ore under the ground.
C. It slowly heated iron ore, then stirred it and heated it again.
D. It changed iron ore into iron, which was a substitute for steel.
A．Louis Pasteur.B．Christian Huygens.C．Isaac Newton.D．A British chemist.
A. Louis Pasteur.
B. Christian Huygens.
C. Isaac Newton.
D. A British chemist.
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