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当前学科：闸门运行工
题目：
单选题
磨损的危害，会造成工作面破坏，损耗（），机械寿命（）。
A
延长、缩短
B
增大、减小
C
增大、缩短
D
减小、缩短
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推荐知识点:
根据叠加原理，电力系统短路时的电气量可分为负荷分量和故障分量，工频变化量指的就是故障分量
超声波加工基本原理
小儿股骨急性骨髓炎并发化脓性髋关节炎的主要途径是（）
（）岁以下人员不能直接办理各项存取款业务。
A trading company of China sold rice to a Japanese Company in June 2006 and the payment was to be made by sight L/C. The total amount of goods was USD65000. The issuing bank of credit overseas designated a bank in China as the advising bank, confirming bank and negotiating bank. After the seller dispatched the goods in November 2006 , he presented the full set of documents including the L/C to the negotiating bank for negotiation. The negotiating bank checked the documents and then sent to the seller a notice indicating that the bank would make payment recently, but the seller had not received the money for a long time. In December 2007, the negotiating bank advised the seller that the issuing bank dishonored the L/C for the documents were not in accordance with the terms of L/C. Question: Could the seller get the payment? Why and how? (Translate the case into Chinese and then answer the question) Helpful hint : The case is mainly about confirmed L/C.
律法和先知道理的总纲（最大诫命）？
根据《机车完好标准》，螺母拧紧后/螺栓螺纹应漏出螺母（）扣。不得在螺母下面加多余的垫圈来减少螺栓的伸出长度。
判断封隔器无法坐封的原因及应采取的措施是什么？
创造性行为产生的内在主观特征是（）
物流服务是（）的重要方式和途径。