设树T的度为4,其中度为1,2,3,4的结点个数分别为4,2,1,1,则T中的叶子结点数为( )。
A.5 B.6C.7 D.8
参考答案:D
An analyst does research about the accrued revenue. Accrued revenue is properly classified on a financial statement as which of the following()
A. Assets.
B. Liabilities.
C. Equity.
光纤通信的()波长在0.8μm~1.8μm之间。
A.微波
B.声波
C.光波
D.电波