单项选择题
对于Lagrange正六面体高阶单元,若三个坐标方向上的节点划分数分别为p,q,r,则该单元位移模式的最高阶多项式的阶次为
Regarding the use of Lagrange regular hexahedron higher-order elements: if the number of nodes is divided into the three coordinate directions respectively p, q, r, the highest polynomial order of element displacement model is
A.p*q*r
B.(p-1)*(q-1)*(r-1)
C.(p+1)*(q+1)*(r+1)