What is the angle of repose? A: The angle of an inclined rock layer measured from a horizontal line B: The angle of the slip plane from a slide C: The angle of plunge into the interior D: The steepest angle at which a material remains at rest

The sum of rake Angle, clearance angle and wedge Angle is ( ).The sum of the major cutting edge angle, minor cutting edge angle, and tool included angle. is ( ) A: 90 ° , 180 ° B: 90 ° , 90 ° C: 180 ° , 180 ° D: 180 ° , 90 °

Using a right-hand hob with the lead angle ω cuts a left-hand gear with the helix angle β , hob swivel-setting angle δ is: A: ω B: β C: β-ω D: β+ω

按Angle 分类法以下何为正确 A: AngleⅠ类是正常咬合 B: AngleⅡ类多为反合 C: AngleⅢ类多为深覆盖 D: Angle Ⅲ 类的下颌为远中咬合关系 E: 右侧为AngleⅢ类关系,左侧为Ⅰ类关系时也属Angle Ⅲ 类错合

The transmission angle is always numerically equal to the angle between the coupler and rocker.

Measured<br/>in main section, the angle between the rake surface and the reference<br/>plane is (). A: rake γo B: clearance angle αo C: Cutting edge angle κr D: Inclination angle λs

按Angle分类法以下何为正确 A: Angle I类是正常咬合 B: Angle Ⅱ类多为反牙合 C: Angle Ⅲ类多为深覆盖 D: Angle Ⅲ类的下颌为远中咬合关系 E: 右侧为Angle Ⅲ类关系，左侧为I类关系时也属Angle Ⅲ类错牙合

The maximum angle at which the intact stability curves are valid for ship’s is the angle for（）.

The Himalayas in the Tibetan language means ______.( ) A: “land of snow” B: “land of river” C: “land of water” D: “land of lake”

某患者一侧磨牙为近中错牙合关系,另一侧磨牙为中性牙合关系,则该患者为 A: Angle第一类 B: Angle第二类 C: Angle第三类,亚类 D: Angle第二类,第一分类 E: Angle第二类,第二分类