【单选题】如果∠1与∠2互补,∠1与∠3互余,那么( )
【单选题】如图,直线l 1 、l 2 被l所截,下列说理过程正确的是( )
【单选题】如果 // , // ,. 那么∠ 与∠ 的关系是( )
【单选题】Although boring operations can be carried out on a lathe, ________ are used for large work-pieces.
【单选题】如图,直线a、b被直线c所截,下列推理过程正确的是( )
【判断题】A lathe can be used to finish many kinds of machining operations.
【单选题】如果∠A与∠B互补,∠B与∠C互余,那么∠A与∠C的关系是( )
【判断题】The lathe is a kind of machine tool that can be used to machine varlous shapes of parts.