【简答题】It can make things primed larger or smaller; it accepts three kinds of paper.
【简答题】The new radio stations before World War II needed three things to be successful: ______, ______, and ______.
【简答题】复制整个桌面屏幕并粘贴到“画图”程序的文件中,将文件以“×××桌面.bmp”为名保存到桌面上。
【单选题】某产品的贡献毛益率为40%,当前销量为4000件,盈亏临界点为2500件,单价下调 4% 后,销售利润率为( )