Pig iron, wrought iron, and steel contain iron carbides made up of ______ of car

游客2025-02-09 32

问题 Pig iron, wrought iron, and steel contain iron carbides made up of ______ of carbon.

选项 A、amounts are different
B、different amounts that
C、different amounts
D、which amounts are different

答案 C

解析

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Pigiron,wroughtiron,andsteelcontainironcarbidesmadeupof______ofcar