党的十九大报告指出，()是引领发展的第一动力，是建设现代化经济体系的战略支撑。
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When you are transferring fuel oil to the setting tanks, precautions to be observed should
A. plugging gooseneck tank vents to prevent accident overflow
B. maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line
C. sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill
D. maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the ship
双向槽干气密封比单向槽干气密封具有较大的流体动压效应和气膜稳定性。()
心式压离缩机喘振将会造成流量表、压力表、温度表大幅度摆动 ()
焊接是通过____ 或____ ，或两者并用，并且用或不用填充材料，使焊件达到原子结合的一种加工方法。
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