3.实数-$\sqrt{2}$的绝对值是( )
0 283643 283651 283657 283661 283667 283669 283673 283679 283681 283687 283693 283697 283699 283703 283709 283711 283717 283721 283723 283727 283729 283733 283735 283737 283738 283739 283741 283742 283743 283745 283747 283751 283753 283757 283759 283763 283769 283771 283777 283781 283783 283787 283793 283799 283801 283807 283811 283813 283819 283823 283829 283837 366461
| A. | 2 | B. | $\sqrt{2}$ | C. | -$\sqrt{2}$ | D. | -$\frac{\sqrt{2}}{2}$ |