"Ex-student", "foretell" and "post-election" contain ______.
A. negative prefixes
B. prefixes of degree or size
C. prefixes of time and order
D. locative prefixes
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在Linux操作系统中,可以通过命令______显示路由信息。
A. Is route
B. netstat-nr
C. ifconfig-r
D. service traceroute
PKI的基本组件不包括______。
A. 认证机构CA
B. 公开可访问的目录
C. 注册机构RA
D. 证书库
In the idiom "in good feather", we change "good" into "high or full" without changing meaning. This change of constituent is known as ______.
A. addition
B. replacement
C. position-shifting
D. variation
CCELD is distinctive for its ______.
A. clear grammar codes
B. language notes
C. usage notes
D. extra columns