【填空题】If you rotate the feed rate knob clockwise, the feed rate _______________ .

The lock on the front door was one which _______. A: needed a piece of wire to open it B: could he opened from inside without a key C: couldn’t be opened without a key D: used a knob instead of a key

The central knob of digital multimeter has several positions. To measure DC/AC voltage,set the multimeter to 1 . To measure rcsistance, set the multimeter to 2 . Tomeasure small current, set the multimeter to 3 . To measure large current, set the multi-meter to 4 ：