16.已知点P(0,m)在y轴的正半轴上,则点M(-m,-m-1)在( )
| A. | 第一象限 | B. | 第二象限 | C. | 第三象限 | D. | 第四象限 |
15.若|a-3|+$\sqrt{2+b}$=0,则a+b的值是( )
| A. | 2 | B. | 1 | C. | 0 | D. | -1 |
8.若2m-5与4m-9是某一个正数的平方根,则m的值是( )
0 294597 294605 294611 294615 294621 294623 294627 294633 294635 294641 294647 294651 294653 294657 294663 294665 294671 294675 294677 294681 294683 294687 294689 294691 294692 294693 294695 294696 294697 294699 294701 294705 294707 294711 294713 294717 294723 294725 294731 294735 294737 294741 294747 294753 294755 294761 294765 294767 294773 294777 294783 294791 366461
| A. | $\frac{7}{3}$ | B. | -1 | C. | $\frac{7}{3}$或2 | D. | 2 |