11.
甲乙两人同时登同一座山,两人距地面的高度y(米)与登山时间x(分)之间的函数图象如图所示则当乙追上甲时,乙距A地的高度为( )
| A. | 165m | B. | 160m | C. | 135m | D. | 120m |
10.
如图,Rt△ACB≌Rt△DFE,∠ACB=∠DFE=90°,D点在AB边的中点处,DE⊥AB,交BC边于点M,DF交BC边于点N,若∠B=∠E=30°,AC=3$\sqrt{3}$,则MN的长为( )
0 298374 298382 298388 298392 298398 298400 298404 298410 298412 298418 298424 298428 298430 298434 298440 298442 298448 298452 298454 298458 298460 298464 298466 298468 298469 298470 298472 298473 298474 298476 298478 298482 298484 298488 298490 298494 298500 298502 298508 298512 298514 298518 298524 298530 298532 298538 298542 298544 298550 298554 298560 298568 366461
| A. | 1 | B. | 2 | C. | 3 | D. | 4 |