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[配置路由器信息]Current configuration：!version 11.3no service password-encryption!hostname router1 第(1)处!enable password pwd12345 第(2)处!interface Ethernet0ip address 192.4.1.1 255.255.255.0!interface Serial0ip address 192.3.1.1 255.255.255.0encapsulation frame-relay IETF 第(3)处no ip mroute-cachebandwidth 2000 第(4)处frame-relay map ip 192.3.1.2 100 broadcawt 第(5)处frame-relay lmi-type cisco 第(6)处!router ospf 1network 192.1.1.0 0.0.0.255 area 0 第(7)处network 192.1.1.0 0.0.0.255 area 0network 192.1.1.0 0.0.0.255 area 0neighbor 192.1.1.2 第(8)处!...End

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11（）

A. available
B. enough
C. sufficient
D. convenient

Write a note of about 50 - 60 words based on the following situation:You’ve learned that your friend Jimmy is ill these days. Write him a note expressing your concern, asking after his health and giving your best wishes.Marks will be awarded for content, organization, grammar and appropriacy.

6（）

A. for
B. of
C. on
D. at

Although a given waveform may contain frequencies over a very broad range, as a practical matter any transmission system will be able to accommodate only a limited band of （） . This, in turn, limits the data rate that can be carried on the transmission （） . A square wave has an infinite number of frequency components and hence an infinite （） .However, the peak amplitude of the kth frequency component, kf, is only 1/k, so most of the （） in this waveform is in the first few frequency components. In general, any digital waveform will have （） bandwidth. If we attempt to transmit this waveform as a signal over any medium, the transmission system will limit the bandwidth that can be transmitted. This, in turn, limits the data rate that can be carried on the transmission（）

A. procedures
B. function
C. route
D. medium