将过期的食品跨区域销售的行为属于( )
A．自然性窜货
B．良性窜货
C．恶性窜货
D．替代性窜货
参考答案：C
To keep the air clean this hospital forbids all the patients ________ in and around it.
A．smoke
B．smoking
C．to be smoking
D．smoked
The standard IEEE 802 format for printing （）in human-friendly form is six groups of two hexadecimal digits, separated by hyphens or colons,in transmission order, e.g. 01-23-45-67-89-ab, 01:23:45:67:89:aB.This form is also commonly used for EUI-64.
A.hard disk logical block address
B.IP address
C.mail address
D.MAC address
