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【单选题】
Which IP telephony component provides call processing, such as signaling, that in a traditional voice network is provided by switching equipment, such as a PBX?（）A.
Advanced call-handling software, such as Cisco Unity
B.
Call-management hardware and software, such as CiscoCallManager
C.
Client-based software, such as CiscoSoftPhone
D.
Voice gateways, such as the Cisco VG248 Analog Phone Gateway
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【单选题】I have ______ gone over my lessons, but he hasn't ______.
A.
already,already
B.
already,yet
C.
yet,already
D.
yet,yet
【单选题】关系运算符是用于关系的判断,其组成的表达式叫关系表达式。其结果只有满足和不满足两种结果。 在C语言中,将满足用1来表示,用0来表示不满足。以下表达式结果为0的表达式是( )
A.
62>=60
B.
(6%2)==0
C.
100!=0
D.
'b' >'a'
E.
2019%4==0
【单选题】I got to the cinema and saw that the film ______ .
A.
already started
B.
had already started
C.
starts
D.
had been started
【简答题】I’ve already decided．I buy a new car．
【简答题】表达式“14%3.0”的结果是__________。
【简答题】德 摩根定理包含的内容为 。A. B. C. D.
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