剪切应力在剪切面内是（）分布的。

A. holding down the life preserver against the chest with one arm crossing the other，covering the mouth and nose with a hand，and feet together
B. knees bent and held close to the body with both arms around legs
C. body straight and arms held tightly at the sides for feet first entry into the water
D. both hands holding the life preserver below the chin，with knees bent，and legs crossed

A. 百分之百显示舞台上的所有对象
B. 百分之百显示舞台上的选定对象
C. 在工作区中，显示整个舞台
D. 移动舞台

A. 正确
B. 错误