“Board the plane” means _________. A: go out of the plane B: leave the plane C: enter the plane D: run away

“Board the plane” means _________ A: go out of the plane B: leave the plane C: enter the plane D: run away from the plane. E: C

If you took a plane to a place, you went there ________. A: on plane B: through plane C: by air D: in sky

Which<br/>plane that axial surfaces of folds are parallel to? ____ A: plane<br/>AB B: plane<br/>AC C: plane<br/>BC D: anyone may be possible

For plane bending the characteristics of deformation are ( ). A: The cross section remains plane when bent; B: The axis after deformation is a plane curve; C: All external loads act on the same plane; D: The axis after deformation is in the same plane with the loading plane.