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当前学科：输电线路带电作业
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《110～750kV架空输电线路设计技术规定》规定，在海拔高度1000m以下地区，操作过电压及雷电过电压要求的悬垂绝缘子串绝缘子片数，110kv不应少于（）片。
A . 7
B . 13
C . 17
D . 25
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下列哪些疾病常有蜘蛛痣?()
Literacy Volunteer Last summer I went through a training program and became a literacy volunteer （扫盲志愿者）. The training I received， though excellent， did not tell me how it was to work with a real student， however. When I began to discover what other people's lives were like because they could not read， I realized the true importance of reading. My first student Jane was a 44-year-old single mother of three. In the first lesson， I found out she walked two miles to the nearest supermarket twice a week because she didn't know which bus to take. When I told her I would get her a bus schedule， she told me it would not help because she could not read it. She said she also had difficulty once she got to the supermarket because she couldn't always remember what she needed. Since she did not know words， she could not write out a shopping list. Also， she could only recognize items by their labels. As a result， if the product had a different label， she would not recognize it as the product she wanted. As we worked together， learning how to read built Jane's self-confidence， which encouraged her to continue in her studies. She began to make rapid progress and was even able to take the bus to the supermarket. After this successful trip， she reported how self-confident she felt. At the end of the program， she began helping her youngest son， Tony， a shy first grader， with his reading. She sat with him before he went to sleep and together they would read bedtime stories. When his eyes became wide with excitement as she read pride was written all over her face， and she began to see how her own hard work in learning to read paid off. As she described this experience， I was proud of myself， too. I found that helping Jane to build her self-confidence was more rewarding than anything I had ever done before. As a literacy volunteer， I learned a great deal about teaching and helping others. In fact， I may have learned more from the experience than Jane did. She could write out a shopping list.（）
朗金土压力理论是建立在一定的假设基础上的，所以其计算结果与实际有出入，所得的()。
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对以下（）对象执行【拉伸】命令无效。
25岁男性，因发热、食欲不振、乏力10天，加重伴腹胀3天于7月10日入院。患者10天前无明显诱因出现发热，最高体温39.7℃，伴食欲不振、乏力，3天前无诱因症状加重，并出现腹胀而入院。患者发病以来无咳嗽、咳痰，无恶心呕吐，无粪便干燥，尿正常，睡眠差。既往体健。在外地打工期间同时有多人发病。入院查体：T38.7℃、R20次／分、P80次／分、BP120/70mmHg，神清、语利，表情淡漠。巩膜无黄染，胸腹部有散在淡红色斑丘疹，直径约2～4mm，压之退色。心肺正常。腹略饱满，脾大肋下3cm，质软，右下腹有压痛，无反跳痛、肌紧张，移动性浊音阴性，肠鸣音3次／分。双下肢无水肿，生理反射存在，病理反射阴性。血常规：WBC3.5×109/L，N42%，L58％，嗜酸性粒细胞消失。PLT200×109/L，Hb149g/L。肝功能：ALT35U/L，AST21U/L，TBIL15μmol/L。肥达反应："O"1：160、"H"1：160、"A"阴性、"B"阴性，外斐反应阴性。粪便常规：（-），尿常规（-）。
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