A customer has requested a proposal for a p5-520 with AIX 5.2 and Sysback. There are no plans to run LPARs or Micro-Partitions on the p5-520 in the near future. The customer has asked the pSeries technical specialist to recommend anything else that may be needed. Which of the following should be recommended in this situation？（）
A、HMC
B、DVD-ROM
C、Tape drive
D、Network switch
PC机网卡按总线类型不同分为ISA卡、EISA卡和（）卡。
麻省理工大学斯隆管理学院的雪恩教授指出，人的生命历程主要是由三种旋律交互构成的一首交响乐。
A、对
B、错
教师一边讲课，一边板书，一边观察学生，是注意的（）的表现。
ZXPOS无线网络测试软件是（）。
A、CNA
B、CNT
C、CNO
D、CNP