【简答题】听对话,回答问题 1. Who is new in Tom's class? [ ] A. Jim. B. Peter. C. Lucy. 2. How many people are there in this conversation (对话)? [ ] A. 2. B. 3. C. 4.
【简答题】Chapter 8, Problem 23 If 500 g of a 40 wt % Ag–60 wt % Cu alloy is slowly cooled from 1000°C to just below 780°C (see Fig. 8.22): (a) How many grams of liquid and proeutectic alpha are present at 850°...