问题
判断题
在任一图G中，当点集V确定后，树图是G中边数最少的连通图。（）
答案
参考答案：对
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在任一图G中，当点集V确定后，树图是G中边数最少的连通图。（）
参考答案：对
Choose the words or expressions and complete the passage There is a saying in England which goes; ‘the rain in Spain(西班牙. falls mainly on the plain’. I can tell you now that it is a . The rain in Spain seems to fall mostly on me. I am spending a year in Galicia and, although it is certainly a beautiful part of the world, I think it rains more than in England. There are no plains here. It is a coastal area, and clouds and storms directly get pushed in from over the ocean with force. As I write, there is a heavy rain outside. I have three umbrellas. Two big ones and a little one which I keep on me , just in case. Believe me what I tell you is all true. The problem is that very often, umbrellas offer no help at all. The wind is so strong that even the best umbrella in the world becomes useless. , I often arrive at work with a dry head and shoulders (protected by my umbrella., but with wet feet and legs. The rain falls hard and fast, and there is no escaping it. When people from England think of Spain, they imagine beaches and sunshine. Those things are a world away from my experiences here in Galicia. But I’m not . It is because of all this rain that the countryside here is so green and beautiful. In the town a very nice white wine is made. And there are beautiful beaches here in Galicia, although there probably is on them at the moment. And most important of all is the people. They are very friendly here. Most people I have spoken to are helpful. So I think that’s worth having a bit of for. Anyway, I love my life here in Galicia.
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