单项选择题

(74) isn't a type of transmission medium used for LANs.

A．Twisted pair
B．Coaxial cable
C．Satellite
D．Optical fiber
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单项选择题
In the RGB color spaces, each pixel on the screen has a corresponding RGB value which consists of (71) components.
A．two
B．three
C．four
D．six
单项选择题
在一个单链表中，若删除p所指结点的后继结点，则执行 (38) 。
A．p→next =p→next→next;
B．p=p→next; p→next =p→next→next;
C．P→next =p→next;
D．p=p→next→next;
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