_____________ is my friend. _____________ name is Li Ming.[ ]

A. He, His

B. She, Her

C. He, My

D. She, His

设有一个64键的键盘，如果采用线型译码键盘结构，至少需要8个端口；如果采用矩阵键盘结构，至少需要______个端口(设每个端口为8位)。