14.三角形的三边长分别为3,4,5,则最长边上的高为( )
| A. | $\frac{4}{3}$ | B. | 3 | C. | 4 | D. | $\frac{12}{5}$ |
9.在平面直角坐标系中,将点A(-1,2)向右平移3个单位长度,再向下平移1个单位长度得到点B,则点B的坐标为( )
| A. | (2,2) | B. | (2,1) | C. | (2,3) | D. | (-4,3) |
8.
如图,直线AB、CD相交于点O,OE⊥AB于O,∠EOC=35°,则∠AOD的度数为( )
| A. | 35° | B. | 55° | C. | 115° | D. | 125° |
6.以下列各组长度的线段为边,能构成三角形的是( )
| A. | 8,4,4 | B. | 5,6,12 | C. | 6,8,10 | D. | 1,2,3 |
5.方程组$\left\{\begin{array}{l}{2x+y=□}\\{x+y=3}\end{array}\right.$的解为$\left\{\begin{array}{l}{x=2}\\{y=△}\end{array}\right.$,则被遮盖的两个数△,□分别为( )
0 296973 296981 296987 296991 296997 296999 297003 297009 297011 297017 297023 297027 297029 297033 297039 297041 297047 297051 297053 297057 297059 297063 297065 297067 297068 297069 297071 297072 297073 297075 297077 297081 297083 297087 297089 297093 297099 297101 297107 297111 297113 297117 297123 297129 297131 297137 297141 297143 297149 297153 297159 297167 366461
| A. | 1,2 | B. | 1,3 | C. | 1,5 | D. | 2,4 |