3.一次函数y=-2x-3的图象与y轴的交点坐标是( )
| A. | (3,0) | B. | (0,3) | C. | (-3,0) | D. | (0,-3) |
2.下列命题中,正确的是( )
| A. | 一组对边平行,另一组对边相等的四边形是平行四边形 | |
| B. | 有一个角为90°的四边形是平行四边形 | |
| C. | 对角线相等的四边形是矩形 | |
| D. | 对角线相等的菱形是正方形 |
16.一次函数y=(m+2)x+1,若y随x的增大而增大,则m的取值范围是( )
0 284733 284741 284747 284751 284757 284759 284763 284769 284771 284777 284783 284787 284789 284793 284799 284801 284807 284811 284813 284817 284819 284823 284825 284827 284828 284829 284831 284832 284833 284835 284837 284841 284843 284847 284849 284853 284859 284861 284867 284871 284873 284877 284883 284889 284891 284897 284901 284903 284909 284913 284919 284927 366461
| A. | m>-2 | B. | m>2 | C. | m<-2 | D. | m<2 |