7.不等式$\frac{1}{3}(x-m)>2-m$的解集为x>2,则m的值为( )
| A. | 4 | B. | 2 | C. | $\frac{3}{2}$ | D. | $\frac{1}{2}$ |
2.
如图,在正方形网格中,每个小正方形的边长均相等.网格中三个多边形(分别标记为①,②,③)的顶点均在格点上.被一个多边形覆盖的网格线中,竖直部分线段长度之和记为m,水平部分线段长度之和记为n,则这三个多边形中满足m=n的是( )
0 284593 284601 284607 284611 284617 284619 284623 284629 284631 284637 284643 284647 284649 284653 284659 284661 284667 284671 284673 284677 284679 284683 284685 284687 284688 284689 284691 284692 284693 284695 284697 284701 284703 284707 284709 284713 284719 284721 284727 284731 284733 284737 284743 284749 284751 284757 284761 284763 284769 284773 284779 284787 366461
| A. | 只有② | B. | 只有③ | C. | ②③ | D. | ①②③ |