3.
如图,AC∥BD,AD与BC交于点E,过点E作EF∥BD,交线段AB于点F,则下列各式错误的是( )
| A. | $\frac{AF}{BF}$=$\frac{AE}{DE}$ | B. | $\frac{BF}{AF}$=$\frac{BE}{CE}$ | C. | $\frac{AE}{AD}$+$\frac{BE}{BC}$=1 | D. | $\frac{AF}{BF}$=$\frac{CE}{DE}$ |
2.
将△ABC沿着平行于BC的直线折叠,点A落到点A′,若∠C=120°,∠A=25°,则∠A′DB的度数( )
0 286256 286264 286270 286274 286280 286282 286286 286292 286294 286300 286306 286310 286312 286316 286322 286324 286330 286334 286336 286340 286342 286346 286348 286350 286351 286352 286354 286355 286356 286358 286360 286364 286366 286370 286372 286376 286382 286384 286390 286394 286396 286400 286406 286412 286414 286420 286424 286426 286432 286436 286442 286450 366461
| A. | 80° | B. | 90° | C. | 100° | D. | 110° |