2.计算$\frac{{m}^{2}}{m-3}$-$\frac{9}{m-3}$的结果是( )
| A. | m+3 | B. | m-3 | C. | 3-m | D. | -m-3 |
1.在?ABCD中,∠A:∠B:∠C:∠D的值可能是( )
0 282957 282965 282971 282975 282981 282983 282987 282993 282995 283001 283007 283011 283013 283017 283023 283025 283031 283035 283037 283041 283043 283047 283049 283051 283052 283053 283055 283056 283057 283059 283061 283065 283067 283071 283073 283077 283083 283085 283091 283095 283097 283101 283107 283113 283115 283121 283125 283127 283133 283137 283143 283151 366461
| A. | 3:1:1:3 | B. | 3:3:1:1 | C. | 1:3:3:1 | D. | 1:3:1:3 |