【单选题】Merge the following two short sentences into one new sentence.
【判断题】在任何有向图中,所有结点的入度之和等于所有结点出度之和。
【单选题】是按照经济业务发生先后顺序逐日逐笔登记的
【简答题】根据所学课文内容填空 At first my new 1 were difficult to tolerate. The air seemed thin, as 2 its combination of gases had little oxygen left. 3 by a lack of fresh air, my head ached. Wang ping handed a mask to ...
【判断题】在任何有向图中,所有结点的入度之和等于有向图边数的 2 倍 .
【判断题】在任何有向图中,所有的入度之和等于所有结点的出度之和.
【判断题】在任何有向图中,所有顶点的入度之和等于所有顶点的出度之和。
【单选题】是按照经济业务发生先后顺序逐日逐笔登记的账簿。
【单选题】In our country the cold weather in the north_____ sharply _____the hot weather in the south.
【判断题】任何有向图中,所有点的入度之和等于所有点的出度之和。