2.
如图,矩形ABCD中,AB=3,BC=4,若将矩形折叠,使C点与A点重合,则EF( )
| A. | $\frac{7}{4}$ | B. | $\frac{15}{4}$ | C. | $\frac{15}{2}$ | D. | $\frac{7}{2}$ |
18.不等式-2x+3≥5的解集在数轴上表示为( )
| A. | B. | C. | D. |
17.若a<b,那么下列结论中正确的是( )
| A. | a-3>b-3 | B. | 3a>3b | C. | $\frac{a}{3}$>$\frac{b}{3}$ | D. | -3a>-3b |
14.
如图,正方形ABCD的对角线上的两个动点M、N,满足AB=$\sqrt{2}$MN,点P是BC的中点,连接AN、PM,若AB=6,则当AN+PM的最小值时,线段AN的长度为( )
0 297001 297009 297015 297019 297025 297027 297031 297037 297039 297045 297051 297055 297057 297061 297067 297069 297075 297079 297081 297085 297087 297091 297093 297095 297096 297097 297099 297100 297101 297103 297105 297109 297111 297115 297117 297121 297127 297129 297135 297139 297141 297145 297151 297157 297159 297165 297169 297171 297177 297181 297187 297195 366461
| A. | 4 | B. | 2$\sqrt{5}$ | C. | 6 | D. | 3$\sqrt{5}$ |