The following machining methods belong to the method of fixed size cutting tool(). A: Turning machining B: Milling machining C: Drilling machining D: Grinding machining

The principles for machining sequence of each surface should be( )<br/>and perform rough machining before finish machining. A: perform datum surface machining before that of other surfaces B: perform main functional surface machining before less important surface machining C: perform plane surface machining before hole surface machining D: perform complex surface machining before simple surface machining

High machining accuracy,( ), high automation, low labor intensity and high production efficiency are the machining characteristics of CNC machine tools. A: Machining parts with simple contour and mass production B: Strong adaptability to processing objects C: A single piece of parts which is difficult to fit or must rely on manual correction and positioning in order to machining accuracy. D: Suitable for machining billet with special large allowance and uneven material and allowance.

The incorrect statement about the locating of the workpiece in the machining process is （ ）. A: Complete locating should be adopted as far as possible to ensure the locating accuracy B: To adopt incomplete locating as far as possible according to machining requirements C: Redundent locating can be used in machining process D: Insufficient locating is strictly prohibited in machining process

The machining quality of parts includes machining accuracy and surface quality.