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采用问卷法进行测量的是（）
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A Dangerous PlacePaula had always wanted to go to New York and now she had the chance at last. She was a journalist, and her newspaper was sending her there to do a series of articles on the city. But before she left her home in London, several friends warned her to be careful and not to go out alone at night in New York. "It's a dangerous place. People get robbed or even killed in broad daylight!" they told herBut once she got there, she was oniy afraid of exhaustion. It was so stimulating and exciting a city that she never got any steep. It took her two weeks to do the articles and she had to interview a lot of people, but she enjoyed every minute. She completely forgot all her friends' warnings until the day before she went back to London. It atl began in a barShe was having lunch there when she suddenly felt someone was watching her. She looked up and noticed a man sitting at a table opposite her. He was staring at her, but looked away. She noticed that he had a scar on his cheek. He was about 30, and had short, curly hairPaula was not worried at all then. She had to go to an airline office to book her flight home. She wanted an afternoon flight instead of a morning one. On her way there, she stopped to look at something in a shop window. To her surprise, she saw the man following her; she could see his reflection in the glass. He had stopped just behind her. Suddenly she felt afraid. She walked on. Then she stopped and looked behind her again. But this time she could not see him.Just then she noticed she had come to the airline office. She went in. After she had finished her business, she decided to phone a friend from a telephone booth there. She was carrying a small, portable but very expensive tape recorder. It was in a black case. She kept her money and passport in the case as well. But the booth was so cramped that she had to eave the case outside. When she came out, it had disappeared. She was stunned. Then she saw the red-haired man hurrying out of the office. He had the case in his hand. She shouted, but it was too late.Read Passage and answer the following questions. Make your answers as short and clear as possible. Write your answers on the Answer Sheet31.Why did Paula go to New York?32. What did her friends tell her before she left London?33.What did the man sitting opposite her look like?34. What did she keep in her black case?35. What happened at last?

（）用于货物验收工作质量或效率的考虑。

通道防雷保护元件，击穿电压约（）V。

采用手提破碎机（风炮）翻开混凝土路面时应怎样减少尘土飞扬？

设在工业检测中工件的图像受到零均值不相关噪声的影响。如果工件采集装置每秒可采集25幅图，要采用图像平均方法将噪声的方差减少为单幅图像的1/10，那么工件需保持多长时间固定在采集装置前（）？

基础必须具有足够的强度和稳定性，同时应能抵御土层中各种有害因素的作用。

操作中发生疑问时怎么办？

20世纪60年代，我国科学技术取得若干重要成就，（）年我国爆炸了第一颗氢弹。

B类空域内，同一航迹、同一巡航高度作目视飞行，巡航表速250千米/小时（含）以下的航空器，最低纵向间隔标准规定为（）千米。