电力电缆中，保护层保护电缆免受外界杂质和水分的侵入，以防止外力直接损坏电缆。第十章
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What should be part of a comprehensive network security plan（）。
Allow users to develop their own approach to network security
B. Physically secure network equipment from potential access by unauthorized individuals
C. Encourage users to use personal information in their passwords to minimize the likelihood of passwords being forgotten
Delay deployment of software patches and updates until their effect on end-user equipment is well known and widely reported
E. Minimize network overhead by deactivating automatic antivirus client update
GPRS下行功率控制，当采用方式B（ModeB）时，对其他参数的要求（）
A. Fixed MAC Mode, GPRS_PC_MEAS_Chan=BCCH
B. Fixed MAC Mode, GPRS_PC_MEAS_Chan=PDCH
C. Dynamic MAC Mode, GPRS_PC_MEAS_Chan=BCCH
D. Extend Dynamic MAC Mode, GPRS_PC_MEAS_Chan=BCCH
创业的资源可以互相结合和转化，创业成功的关键在于对资源的掌控。
A. 正确
B. 错误
绝缘油介质损耗测试时，在温度达到试验温度时，应在（）内开始测量损耗因数。
A. 5min
B. 10min
C. 15min
D. 20mi
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