【简答题】On an island there are exactly seven towns: T, U, V, W, X, Y and Z. All existing and planned roads on the island are two-way and run perfectly straight between one town and the next. All distances(距离;...
【单选题】听力原文:M: I was away for three weeks, but it seems like three days. W: So you must have had a very good time in Guilin. What do we know about the man?