The delayed value of rotation angle of the output shaft when the rotation of input shaft turns from positive to negative is .
A:
A:
举一反三
- The cantilever beam shown here is subjected to two equal and opposite couples，for the section B（ ）.[img=414x136]1803a25c3173b7f.jpg[/img] A: The deflection is zero, the angle of rotation is not zero B: The deflection is not zero, the angle of rotation is zero C: Deflection and angle of rotation are both not zero D: Both deflection and angle of rotation are both zero
- 轮作 A: shuttle B: shift C: crop rotation D: take turns
- The rotation angle of the cross section at the maximum deflection of the beam must be equal to zero. ( )
- Among the following deep drawing methods, which have a great impact on the original shaft production? ( ) A: Direct extension of shaft B: Direct extension of inclined shaft C: Deepening of concealed shaft D: Deepening of inclined shaft
- From the anatomical position, turning the palm to face the body is an example of ____ A: medial rotation B: lateral rotation C: circumduction D: adduction