[单选题]
13.10: An object is thr 8i qfe85i+dltgqble +x5 9i5ke68ic iowglp 7.*( d: 8hbsnralfn straight upward. The object remains in free fall until it returns to its initial launch point. Which one of the following graphs could represent the velocity of the object as a function of time during its flight?
grdh*l(lnfp . :sa7b8