Faulty operation of any system is indicated by very definite

It's a very old car and the spare parts are _________ available.

A. no any longer

B. no longer

C. not any longer

D. no more

The first requirement for logical troubleshooting of any system is the ability to

A.collect all available data on a casualty

B.recognize normal operation

C.identify the probable cause of a symptom

D.isolate the faulty component

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 (71) ．This，in turn，limits the data rate that can be carried on the transmission (72) ．Asquare wave has an infinite number of frequency components and hence an infinite (73) ．However, the peak amplitude of the kth frequency component，kf，is only 1/k，so most of the (74) in this wavefonn is in the first few fiequency components．In general，any digitalwaveform. will have (75) bandwidth．If we attempt to transmit this waveform. as a signalover any medium，the transmission system will limit the bandwidth that can be transmitte

（71）

A．frequencies

B．connections

C．diagrams

D．resources

（）is not included in the main contents of the operation and maintenance of the information system.

A.Daily operation and maintenance

B.System change

C.Security management

D.Business change

The two goals of an operation system are( )and efficiency．

A．convenience

B．quick

C．optimize

D．standardize

A. The processor is faulty.

B. The file system is fragmented.

C. The modem drivers are corrupt.

D. The power supply is faulty.

Frequent ______ is important: fixing or changing faulty parts of the propulsion system when necessary.

The ship is listing too much due to your faulty method in loading operation．You must keep her ______．

A.flat

B.up

C.upright

D.vertical