Description Katu Puzzle is presented as a directed graph G(V, E) with each edge e(a, b) labeled by a boolean operator op (one of AND, OR, XOR) and an integer c (0 ≤ c ≤ 1). One Katu is solvable if one can find each vertex Vi a value Xi (0 ≤ Xi ≤ 1) s…
In this lesson you will learn to describe an experience. 本课将会学习描述一次经历 课上内容(Lesson) 词汇(Key Word ) # 常用词汇现在时态(present tense) to 过去形式(past forms) cut -> cut hit -> hit hurt -> hurt lend -> lent send -> sent spend -> spent # 注意…