10.下列命题中逆命题错误的是( )
| A. | 内错角相等两直线平行 | B. | 直角三角形的两锐角互余 | ||
| C. | 全等三角形的对应边相等 | D. | 互为相反数的两个数的绝对值相等 |
8.下列二次根式,最简二次根式是( )
0 284726 284734 284740 284744 284750 284752 284756 284762 284764 284770 284776 284780 284782 284786 284792 284794 284800 284804 284806 284810 284812 284816 284818 284820 284821 284822 284824 284825 284826 284828 284830 284834 284836 284840 284842 284846 284852 284854 284860 284864 284866 284870 284876 284882 284884 284890 284894 284896 284902 284906 284912 284920 366461
| A. | $\sqrt{\frac{1}{5}}$ | B. | $\sqrt{0.5}$ | C. | $\sqrt{5}$ | D. | $\sqrt{50}$ |