举一反三
- If the section figure has a symmetry axis, then for the figure ( ) to its symmetry axis. A: Both the static moment of inertia and the moment of inertia are not zero; B: Both the static moment of inertia and the moment of inertia are zero; C: The static moment of inertia is not zero, the moment of inertia is zero; D: The static moment of inertia is zero, the moment of inertia is not zero.
- At bottom dead center, the centerline of the connecting rod usually coincides with the（） A: angularity of the piston motion B: inertia moment from the piston C: centerline of the cylinder D: centerline of the king pi
- The area of section is A, the centroid is C and the moment of inertia of section with respect to the z axis is[img=14x22]1803a25ae5167bc.png[/img] , then [img=21x22]1803a25aee78117.png[/img] is .[img=185x110]1803a25af82e370.jpg[/img] A: [img=55x26]1803a25b03408a9.jpg[/img] B: [img=99x21]1803a25b0d903ef.jpg[/img] C: [img=71x53]1803a25b1883f79.jpg[/img] D: [img=85x56]1803a25b22f93d9.jpg[/img]
- It’s the Axes System used to define the Newton's Laws of Motion. A: Inertia B: Earth-fixed C: Body D: Navigational
- We hadn't met for about 15 years, but I recognized her ______ I saw her. A: the moment B: the moment when C: for the moment D: at the moment when
内容
- 0
Which of the following systems belongs to the Body Axes Systems? A: Inertia Axes System B: Earth-fixed Axes System C: Body Axes System D: Navigational Axes System E: Stability Axes system F: Wind Axes system
- 1
The flexure formula is based on the requirement that the ( ) on the cross section is equal to the ( ) produced by the ( ) distribution about the neutral axis.? resultant moment; moment; linear normal stress|resultant moment; moment; nonlinear normal stress|resultant moment; moment; nonlinear shear stress|resultant normal force; force; linear normal stress
- 2
A) the moment C) the moment's B) a moment D) a moment's A: the moment B: a moment C: the moment's D: a moment's
- 3
I will certainly tell him about the matter ______ he comes in. A: the moment B: moment C: the immediately D: suddenly
- 4
29() A: at one moment B: at the last moment C: at the moment D: at any moment