问题
填空题
在改进一个要求运输费用最低的运输方案时，闭合回路法是从一个改进指数为绝对值最大的负数所在的空格开始回路，在这条闭合回路上只允许有（）空格。
答案
参考答案：一个
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在改进一个要求运输费用最低的运输方案时，闭合回路法是从一个改进指数为绝对值最大的负数所在的空格开始回路，在这条闭合回路上只允许有（）空格。
参考答案：一个
| 补全对话。 |
| Zhang: Hi, Amy. 1 ? Amy: Hi, Zhang. I'm glad to see you. I've had a bad day. Zhang: Why? 2 ? Amy: Well, this morning I was late at the bus stop. The bus had gone so I had to walk to school. Zhang: That's a long walk. Amy: Yeah. And then it started raining and I'd forgotten my umbrella. Zhang: Oh no! 3 ? Amy: Yes, I was late and wet . And 4 . They had gone to the museum. Zhang: You missed a museum trip. That's too bad. Amy: Then in the afternoon I went to the library to study for the math test. And guess what? Zhang: Oh no. What? Amy: 5 . Zhang: You are right. You did have a bad day. |
| ( )1. A. What are you B. How are you C. How old are you D. What do you do ( )2. A. What was happened B. What is happened C. What the matter is D. What happened ( )3. A. How did you go to school B. Are you get wet C. Did you get wet D. Do you get wet ( )4. A. my class wasn't at school B. my class was having lessons C. my class did homework D. my class was at school ( )5. A. I forgot my math book at home B. I'd left my math book at home C. I left my Chinese book at home D. I left my English book at school |