计算题：以毫安输出的0.2级变送器，配0.1级标准电阻，用0.05级电位差计测量。求该测量系统的综合误差。
参考答案：
由于局部误差项数较少，可按绝对值法计算综合误差。
已知变送器允许误差δ1＝±0.2%
标准电阻允许误差δ2＝±0.1%
电位差计允许误差δ3＝±0.05%
综合误差δ＝±（0.2＋0.1＋0.05）＝±0.35%
综合误差为±0.35%。
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| Rosa liked making up stories. She was so 1 that her classmates believed her from time to time. In fact, the whole class believed her! At first she supposed it was 2 . Now, as she got up to 3 before the class, she knew that make -believe stories had some way of coming back to make you sad. Rosa's parents were separated. Nine months out of t  he year, Rosa lived with her mother in an apartment on Anderson Street. But when summer 4 , she went to her father's farm in Arizona. The farm was great! Rosa rode horses and 5 with some farm work. Her father, however, was so 6 that he couldn't find time to go places with her. W  hen she arrived each summer, her father would7 her at the airport and take her out to eat. And the day she went back to the 8 he would always buy her a present. When summer finished, Rosa 9 to her mother. At s  chool she heard lots of stories her friends toldabout their family trips. Rosa wished she had a 10 to talk about. Not long after 11 began, Rosa was looking through travel magazines in the school library. They talked about many exciting 12 , like England and Germany. When Rosa's friends asked what she had done that summer, she made up something that was not 13 . Remembering the travel magazines she had looked at, she told her classmates that she and her father had gone to 14 . When the class began s  tudying England, Mr. Thomas asked Rosa to tell all the things she could 15 about her trip to England! | ||||
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