【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】Brazil is the greatest football nation in the world. There are 170 million Brazilians. How many of them are football fans? 100 million! All of them think they know all about football. This makes life ...
【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°...