2.方程x2+x-12=0的两个根为( )
| A. | x1=-2,x2=6 | B. | x1=-6,x2=2 | C. | x1=-3,x2=4 | D. | x1=-4,x2=3 |
18.
如图,AE∥DF,AE=DF.则添加下列条件还不能使△EAC≌△FDB.( )
0 284209 284217 284223 284227 284233 284235 284239 284245 284247 284253 284259 284263 284265 284269 284275 284277 284283 284287 284289 284293 284295 284299 284301 284303 284304 284305 284307 284308 284309 284311 284313 284317 284319 284323 284325 284329 284335 284337 284343 284347 284349 284353 284359 284365 284367 284373 284377 284379 284385 284389 284395 284403 366461
| A. | AB=CD | B. | CE∥BF | C. | CE=BF | D. | ∠E=∠F |