【判断题】数控加工过程中主轴转速S可以用机床面板上的主轴倍率开关调整。
【简答题】有一代号为6215的滚动轴承其类型名称是(),直径系列为2,内径尺寸为(),公差等级为()。
【单选题】Jenny likes to ___________ in the rain. [ ]
【简答题】Splash is ________. A] a certain kind of material used for washing in high quality [B] something like a machine used to wash clothes [C] the softest, quickest, and whitest car to drive [D] one of thou...
【判断题】卷叶铁生长期盆土必须保持湿润。缺水易引起落叶,但水分太多或盆内积水,同样引起落叶或叶尖黄化现象。()