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【简答题】
PD2T 、 PD2D 功能:发送:输入的 E1 信号经过接口模块进入解码器,在解码器中经过______,恢复出 ____ 码型的数据信号及_______,送给映射模块。在映射模块中将送来的 _______ ,再经过通道开销处理后形成 VC-12 ,经指针处理形成 _______ ,再通过复用形成 VC-4 ,送给交叉单元
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【单选题】We know from the last paragraph that______.
A.
Wave is a basis for face—to—face communication on line
B.
Wave allows people to look at e-mail from a new angle
C.
most Internet users will have access to Wave
D.
Wave is now as popular as standard e-mail
【单选题】Physicians need ______ expertise in pain and symptom management and skills in communication to meet the many needs of this population.
A.
complex
B.
complicated
C.
intricate
D.
sophisticated
【单选题】Netwar should be understood as a war aimed at ______.
A.
disrupting the enemy's communication systems
B.
damaging the institutions of the enemy state
C.
manipulating the enemy's means of production
D.
destroying the leadership of the enemy state
【单选题】The Flying Phone Box A surprise for air travelers The strides made in satellite-communications technology in recent years are at last yielding benefits for air travelers, particularly executives who n...
A.
Y
B.
N
C.
NG
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