【简答题】车削加工时车刀的纵向进给量f=0.3mm/r,工件转速n=450r/min,求进给速度v f. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【判断题】函证银行存款的唯一目的是证实银行存款是否真实存在 . ( )
【判断题】The author suggests that it is good benchmark to set your energy-saving preferences to put your hard drive to sleep after 15 minutes of inactivity.
【单选题】据美国莱曼兄弟公司的一项研究显示,()成本最低。
【单选题】Pizza is a kind of __________ food.
【单选题】Pizza is a kind of Chinese food.