【单选题】A frame with two,or sometimes four,arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the().
【简答题】Choose the correct word. ► Stick it together with glue/cotton . glue 1 Sew it with a pin/needle . ____ 2 Cut it with scissors/a drill . ____ 3 Tighten it with a hammer/screwdriver . ____...