7.
如图,同位角是( )
| A. | ∠1和∠2 | B. | ∠3和∠4 | C. | ∠2和∠4 | D. | ∠1和∠4 |
5.下列二次根式中,是最简二次根式的是( )
0 284730 284738 284744 284748 284754 284756 284760 284766 284768 284774 284780 284784 284786 284790 284796 284798 284804 284808 284810 284814 284816 284820 284822 284824 284825 284826 284828 284829 284830 284832 284834 284838 284840 284844 284846 284850 284856 284858 284864 284868 284870 284874 284880 284886 284888 284894 284898 284900 284906 284910 284916 284924 366461
| A. | $\sqrt{25}$ | B. | $\sqrt{7}$ | C. | $\frac{1}{\sqrt{3}}$ | D. | $\sqrt{12}$ |