迟缓型便秘不应选择下列哪种食品?()
A.大豆及其制品
B.粗粮
C.酵母
D.洋葱
E.白酒
参考答案:E
The position, however, ____ you are applying , is not quite a well –paid one .
A that B which C for which D to which
给出一组权值W={5,10,13,17,23},利用霍夫曼算法求出的扩充二叉树的带权外部路径长度为( )。
A.156
B.151
C.158
D.68