LTE采用自组织网络（SON）技术降低网络运营成本及网络复杂度，如网络的自动配置和自动优化功能。
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吊钩桥式起重机，主钩起重量20t，副钩起重量5t，跨度19.5m，工作级别A5，室内用，其型号如何表示？
What would NOT require that a detailed report of the release of hazardous cargo be made to the Department of Transportation? （）
A. The valve on an empty portable tank that contained acetone is accidently opened and some of the residue escapes to the open sea
B. A carboy of nitric acid is broken on deck while loading and is flushed overboard with no injuryor damage
C. Part of your deck cargo of five gallon cans of paint is damaged and leaking so you jettison them to eliminate the fire hazard
D. Heavy weather causes damage to packages of a hazardous liquid that is subsequently pumped out at sea through the bilge pumping system
MRP的基本原理是根据需求和预测来测定未来物料供应和生产计划，提供（）的准确时间和数量（）。
A. 物料需求
B. 采购需求
C. 制造资源
D. 供应需求
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