问题
解答题
某零件的设计图纸上标明这样一个数据20±1mm，实际生产时，测得这个零件的实际长度是19.8mm，这个零件合格吗？
答案
“正”和“负”相对，20±1mm表示该零件最长21mm，最短19mm．因为19mm＜19.8mm＜20mm，所以该零件合格．
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某零件的设计图纸上标明这样一个数据20±1mm，实际生产时，测得这个零件的实际长度是19.8mm，这个零件合格吗？
“正”和“负”相对，20±1mm表示该零件最长21mm，最短19mm．因为19mm＜19.8mm＜20mm，所以该零件合格．
—— Good afternoon, may I help you? —— Yes, I am interested in a one-bed room. 小题1: —— 小题2: How about a two-bed room? —— Well, I am a student and I have to consider the cost. 小题3: ——￡150 a month. The one-bed room is￡250 while the two-bed room is￡400 a month. —— A little bit expensive for me. —— 小题4: But actually I have to tell you that the one-bed room doesn't have a dish washer. All of the two-bed rooms do. —— Ah, I see. When could I see the room? How about later this afternoon? —— That would be fine. 小题5:
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