Choose the correct translation of the following sentence:He takes the first unsteady steps on a journey to Portland's streets, the battlefield where he fights alone for his independence and dignity.
A. 他摇摇晃晃迈出了走上波特兰街头的头几步,那是他为独立与尊严而战的战场。
B. 他摇晃着踏上了去波兰战场的前几步,那儿,他独自为独立与尊严而战。
What qualities do you think are not needed for your future career, eg. a doctor ?
A. physical qualities
B. beautiful appearance
C. mental or psychological qualities
D. technical qualities
对一棵折半查找的判定树进行中序遍历能得到( )。
A. 任意序列
B. 递增序列
C. 递减序列
D. 递增递减交替序列
具有7个关键字的有序表,等概率条件下进行折半查找的平均查找长度为( )。
A. 15/7
B. 16/7
C. 17/7
D. 18/7