3.下列命题为假命题的是( )
| A. | 对顶角相等 | B. | 两直线平行,同位角相等 | ||
| C. | 内错角相等 | D. | 三角形内角和是180度 |
19.若分式$\frac{|x|-2}{{x}^{2}-4x+4}$的值为0,则x的值为( )
0 282176 282184 282190 282194 282200 282202 282206 282212 282214 282220 282226 282230 282232 282236 282242 282244 282250 282254 282256 282260 282262 282266 282268 282270 282271 282272 282274 282275 282276 282278 282280 282284 282286 282290 282292 282296 282302 282304 282310 282314 282316 282320 282326 282332 282334 282340 282344 282346 282352 282356 282362 282370 366461
| A. | 2 | B. | -2 | C. | 2或-2 | D. | 2或3 |