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单选题
Each NCS woks as a type of（）, assisting controlling and monitoring telex and telephone network as quickly as possible.
A
switch operator
B
communication gateway
C
national operator
D
on-scene commande
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On the WSUS server， type the gpupdate /force command at the command prompt.B
On the WSUS server， type the wuauclt /detectnow command at the command prompt.C
On each of the six servers， type the gpupdate /force command at the command prompt.D
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Add the Known Type attribute to the data contract.Set a default value in each of the data member declarations.B
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Set the Emit Default Value property of each data member to false.D
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A batch for each currency and credit card typeC
A batch for each cassette and currencyD
A brand for each supported credit card typeE
A brand for each currency and credit card type
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