某水闸建筑在砂质壤土地基上，水闸每孔净宽8m，共3孔，采用平板闸门，闸门采用一台门式启闭机启闭，闸墩厚度为2m，因闸室的总宽度较小，故不分缝。闸底板的总宽度为30m，净宽为24m，底板顺水流方向长度为20m。施工中发现由于平板闸门主轨、侧轨安装出现严重偏差，产生了质量事故。
问题：
| 根据水利部1999年3月4日颁布的《水利工程质量事故处理暂行规定》(水利部令第9号)，工程质量事故分类的依据是什么工程质量事故分为哪几类 |
参考答案：
解析：根据水利部1999年3月4日颁布《水利工程质量事故处理暂行规定》(水利部令第9号)，工程质量事故按直接经济损失的大小，检查、处理事故对工期的影响时间长短和对工程正常使用的影响进行分类。分为一般质量事故、较大质量事故、重大质量事故、特大质量事故四类。
| 阅读理解。 |
| A small man with a fat stomach got on the train at the last station before the frontier (边境). He carried a paper bag. And four feet of ducks (鸭子) could be seen under the cover. The man found an empty seat, put the bag in the middle of the floor, took out a newspaper and began to read. Then a policeman came in. Of course he saw the bag with the ducks' feet at once and said, "Whose is that bag?" Nobody answered. The policeman repeated the question, and said, "I shall have to take it away from the owner. Food mustn't be taken out of country." "Well, then," said the small man with a fat stomach." Hurry up and take it away. We want to go home. "The policeman took the bag and went on to the next carriage (车厢). At the next station, when they were safely across the frontier, the small man got up, smiled at other passengers and said, "I hope that they'll enjoy the ducks' feet. The rest of the bag had nothing but rubbish in it." Then he opened his coat and pointed to another bag he was carrying under it. It was tied over the stomach, which was not really fat. "I have the rest of the two ducks here," he said. With these words, he got off the train. But while he was happily walking to the exit with the bag in his hand, a policeman came up to him, saying, "Hey, man! Foreign food mustn't be brought in." |
| 1. The small man put the bag in the middle of the floor . |
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| A. because the other passengers didn't like it B. so that the policeman could find it easily C. so that he could make more room for himself D. because there was not an empty seat in the carriage |
| 2. Why did the first policeman take the paper bag away? Because . |
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| A. he wanted to find the owner of the bag B. he enjoyed the ducks' feet in the bag C. the bag was put in a wrong place in the carriage D. food can't be taken abroad |
| 3. The bag the policeman took away had nothing in it except . |
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| A. two ducks B. rubbish C. the ducks'feet and rubbish D. the ducks'feet |
| 4. How many ducks are there in the passage? |
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| A. 2. B. 4. C. 6. D. We don't know. |
| 5. What happened in the end? The small man . |
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| A. failed to take his food home B. crossed the frontier with two paper bags C. took the ducks safely home D. hid his ducks under his coat again |