【单选题】During heart transplantation, the surgeon cuts the pericardial reflection that forms the boundary of the oblique pericardial sinus. The oblique pericardial sinus is found between the
【简答题】In an oblique sketch of a cube:A. the frontal face appears in its true shape B. both receding axes are at 30 degrees to the
horizontal C. all faces are equally distorted D. the depth distances must be...