【多选题】与Bourn shell (sh) 相比,Bourn-Again shell ( bash)具有哪些额外的特性? (选择所有正确答案) ( )
【简答题】由于加工中心效率高,装夹工件的辅助时间对加工效率影响较大,所以要配套夹具在使用中要____。
【单选题】等截面的空心圆轴,两端受扭转力偶矩 T = 2kNm 作用。若圆轴内外径之比 α = d/D=0.9 ,材料的许用剪应力 [ τ] = 50MPa ,则根据强度条件,轴的外径 D 应为 mm 。
【单选题】关于应用文写作的相关知识表述不正确的是( )
【判断题】对于无收益资产而言,远期价格等于其标的资产现货价格的终值。
【单选题】20世纪90年代初,江西新淦大洋洲商墓出土了480多件青铜工具,其中犁、铲、斧等11种青铜农具共有53件。材料说明商代( )
【单选题】— Would you like to talk with your father or mother, Liu Mei? — We don't have the same topic. [ ]
【单选题】For example, don't keep looking at the ground or staring into space, or talk with your arms _____
【简答题】阅读理解。 Do you often talk with your parents? Here is some advice (建议) on how to talk with them. Try to start your talk with something fun. This will make talking easier. For example, ask them questions ...