请分别写出M——型、和U——型组织结构,以及它们各自的特点、优点和缺点。
Which of the following components is called “the brain of the computer”?
A. Memory
B. Joystick
CPU
D. Keyboard
What are the two most common types of memory?
A. Static RAM and dynamic RAM
B. Screens and scanners
C. ALU and CU
D. File servers
Which of the following elements is an output device?
A. Image scanner
B. Monitor
C. Mouse
D. Touch screen