Which of the following computer recovery sites is the least expensive and the most difficult to test? 以下哪项计算机恢复站点是最便宜的和最难测试的？（）A、non-mobile hot site. 非移动热站B、cold site. 冷站C、warm site. 热站D、mobile hot site. 移动热站
Which of the following computer recovery sites is the least expensive and the most difficult to test? 以下哪项计算机恢复站点是最便宜的和最难测试的？（）
- A、non-mobile hot site. 非移动热站
- B、cold site. 冷站
- C、warm site. 热站
- D、mobile hot site. 移动热站
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