A system must be evaluated and tuned. In order to use a set of performance evaluation programs （e.g.， filemon， svmon， and tprof） which of the following packages should exist on the system in question？（）
- A、 bos.adt
- B、 bos.perf
- C、 Java.adt
- D、 perfagent.tools
正确答案:D
答案解析:有
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