フリー問題

問題文

A desktop machine pressed into service at a research institute stopped the moment its single power unit failed, while the PowerEdge server beside it kept serving. Which pair states what the desktop design lacks and what the server design adds?

選択肢

1. The desktop box stops when one unit fails while the server keeps on, so the desktop design lacks the paired redundancy and the server design adds the hot replacement in that justification.
2. The desktop box stops when one unit fails while the server keeps on, so the desktop design lacks the paired redundancy and the server design adds the hot rectifier in that justification.
3. The desktop box stops when one unit fails while the server keeps on, so the desktop design lacks the paired regulator and the server design adds the hot replacement in that justification.
4. The desktop box stops when one unit fails while the server keeps on, so the desktop design lacks the paired regulator and the server design adds the hot rectifier in that justification.