Which one is close to the upper surface of liver? () A: diaphragm; B: superior duodenal flexure; C: duodenojejunal flexure; D: spleen; E: right ureter

The duodenum does not include A: superior part B: descending part C: transverse part D: ascending part E: duodenojejunal flexure

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