- Is the bread enough for you?

- Oh, no. I’m so hungry. I want _________cakes, too.

A．little

B．a little

C．few

D．a few

区分MCS-51单片机片外程序存储器和片外数据存储器的最可靠的方法是（）

A.看其芯片的型号是ROM还是RAM

B.看其离MCS-51芯片的远近

C.看其位于地址范围的低端还是高段

D.看其是与RD信号连接还是与PSEN信号连接