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【多选题】
下列关于故障诊断的常用方法，描述正确的有（）。
A.
振动脉冲测量法专门用于滚动轴承磨损和损伤的故障诊断
B.
噪声是设备的固有信息，它的存在不等于有故障，要根据噪声信号的特征量来判断是否存在故障
C.
当机件温度超过其额定工作温度且发生急剧变化时，预示着故障的存在和恶化
D.
物体内部裂纹的无损探测法包括射线探测法、超声波探测法、涡流探测法、渗透探测法等
E.
油液污染监测法是通过对设备循环流动的油液污染状况进行监测，获取机件运行状态的有关信息
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trade promotions.
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【判断题】Purchase discounts are the same as trade discounts.
A.
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B.
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【判断题】Purchase discounts are the same as trade discounts.
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【单选题】Accounting records are partially destroyed by a flood. the following information relating to the period from 31 Decembers 20X6 until 19 April 20X7 is available. Cash paid to supplier $4,000 Contra ent...
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【简答题】A transaction for $10,000 of sales offers 2% trade discount and 5% cash discount. If both discounts areclaimed, how much is posted to revenue?A. $9510 B. $9500 C. $9310 D. $9300
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【简答题】健康人群每日摄入（）g食盐即可完全满足机体对钠的需要。
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【判断题】健康人群每人每日摄入食盐8g，即可完全满足机体对钠的需要。摄入盐与高血压病的发生具有负相关性。
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【简答题】You work for Lansia Trade, Ltd. headquartered in Shanghai. You want to import printers and DVD burners from the USA and you are interested in the products supplied by ATT, Inc. in an advertisement. W...
查看完整题目与答案
【判断题】复合材料的对口错边量应不大于钢板复层厚度的5％，且不大于2mm。
A.
正确
B.
错误
查看完整题目与答案
【判断题】Purchase discounts are the same as trade discounts.
A.
正确
B.
错误
查看完整题目与答案