I know this shopping mall very _______. [ ]
A. good
B. much
C. nice
D. well
答案:D
下列哪项不能提示恶性嗜铬细胞瘤的诊断()
A.外形不规则
B.肿瘤大于5cm
C.T2加权像瘤体呈明显高信号近似于CSF
D.后腹膜发现转移淋巴结
E.以上各项全对
设根结点的层次为0,则高度为k的二叉树的最大结点数为
A.2k-1
B.2k
C.2k+1-1
D.2k+1