ProE中,通过编辑命令对零件的尺寸进行修改后,零件必须()。 屏幕刷新。 再生。 重新定义。 无须做任何操作。
An anchored vessel is servicing an aid to navigation and is restricted in her ability to maneuver. Which lights will she show? () Three lights in a vertical line,the highest and lowest red and the middle white,and anchor lights。 Three lights in a vertical line,the highest and lowest red and the middle white,ONLY。 Anchor lights ONLY。 Anchor lights and sidelights ONLY。
什么是锰结核?它在世界海洋中的储量及分布情况如何?
The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to (). secure all openings to the tank。 discharge an initial charge of CO2 with a hand portable extinguisher。 direct a fire hose into the tank and energize the fire main。 spray the tank boundaries with a fire hose to promote cooling。
世界海洋渔业资源分布的情况如何?
股份公司目前推行的形象用语是:()。