8.下列命题中,是真命题的是( )
| A. | 相等的角是对顶角 | B. | 互补的角是邻补角 | ||
| C. | 同旁内角是互补的角 | D. | 邻补角是互补的角 |
7.下列实数中,是无理数的是( )
| A. | 0 | B. | $\frac{1}{2}$ | C. | $\sqrt{5}$ | D. | $\sqrt{4}$ |
6.下列各组数中,不是二元一次方程x+y=10的一组解的是( )
| A. | $\left\{{\begin{array}{l}{x=-3}\\{y=13}\end{array}}\right.$ | B. | $\left\{{\begin{array}{l}{x=12}\\{y=-2}\end{array}}\right.$ | C. | $\left\{{\begin{array}{l}{x=2}\\{y=5}\end{array}}\right.$ | D. | $\left\{{\begin{array}{l}{x=4}\\{y=6}\end{array}}\right.$ |
5.
如图,直线a,b被直线c所截,与∠1是同位角的角是( )
| A. | ∠2 | B. | ∠3 | C. | ∠4 | D. | ∠5 |
4.计算:$\root{3}{8}$的值是( )
| A. | 8 | B. | ±2 | C. | -2 | D. | 2 |
3.下列条件中,能判定四边形是平行四边形的是( )
| A. | 一组对角相等 | B. | 一组对边相等 | ||
| C. | 两组对边分别相等 | D. | 两组对角相等 |
2.若等腰三角形的一个内角等于15°,则这个三角形为( )
0 297162 297170 297176 297180 297186 297188 297192 297198 297200 297206 297212 297216 297218 297222 297228 297230 297236 297240 297242 297246 297248 297252 297254 297256 297257 297258 297260 297261 297262 297264 297266 297270 297272 297276 297278 297282 297288 297290 297296 297300 297302 297306 297312 297318 297320 297326 297330 297332 297338 297342 297348 297356 366461
| A. | 钝角等腰三角形 | B. | 直角等腰三角形 | ||
| C. | 锐角等腰三角形 | D. | 钝角等腰三角形或锐角等腰三角形 |