若在没有安装PowerPoint的计算机上放映幻灯片，下列说法正确的是（） 将播放器和演示文稿一起解压缩。 只将演示文稿解压缩。 不需要解压缩。 根本不能放映。
控制配煤的挥发份应保持在24～30%。
The refrigerating agent can （） at low temperature in the evaporator. expand。 evaporate。 condense。 distil。
No person may serve as the person in charge of both the vessel and the facility during oil transfer operations unless（）. there is ready access between the two。 the vessel and facility are immediately adjacent。 the person in charge has a rapid means of transportation between the two。 the Captain of the Port authorizes such procedure。
高炉煤气换为焦炉煤气加热时，要求主管压力在2500Pa以上就可以更换。
当上升气量小时，浮阀塔的浮阀应（）；当上升气量大时，浮阀应（）。
