读图,完成下列问题.
If you ____ ____ ____ ____ get a good job, you must catch it.
1.2乘2.1的积加上10.5除以2.1的商,和是多少?
如图,△ABC内接于⊙O,AH⊥BC于点H,若AC=24,AH=18,⊙O的半径OC=13,则AB=____.