Innovative approaches to manufacturing, coupled with the tremendous size of the domestic market, led to the emergence of the United States as an industrial giant.
【简答题】Please listen to the TED speech carefully and try to write down every sentence in detail. Check the answer and remember the now words and phrases.
【简答题】选择题: 1 . Fe ― Fe 3 C 合金中,合金具有最好流动性的是( )。 ( A ) C%=4.00% ( B ) C%=4.30% ( C ) C%=4.80% ( D ) C%=5.00% 2 .凝固的热力学条件为( )。 ( A )形核率 (B) 系统自由能增加 ( C )能量守衡 ( D )过冷度 3 .二元相图中,当有二次相析出时,固溶线表现为 ( )。 A 垂线 B 水平线 C...