In the absence of external forces，adding weight on one side of a floating vessel causes the vessel to（）. ["heel until the angle of loll is reached","list until the center of buoyancy is aligned vertically with the center of gravity","trim to the side opposite TCG until all moments are equal","decrease draft at the center of flotatio"]
城镇燃气输配系统中的输配管网是将（）的燃气输送至各储气点、调压室、燃气用户，并保证沿途输气安全可靠。 ["调压站","门站","储气设施","瓶组"]
在Word文档的打印预览状态，若要打印文件（）。 ["只能在打印预览状态打印","在打印预览状态不能打印","在打印预览状态也可以直接打印","必须退出打印预览状态才可以打印"]
公关促销的方式主要有哪几种？
车外圆时，沿工件直径方向上的分力称为（）。 ["主切削力","进给力","背向力"]
在布置和执行安全措施过程中，由于设备或系统原因不能满足工作票所列的安全措施要求，工作许可人应如何进行？
