[单选题]
13.10: An object is th */rzl w( o/ clgkc/lz0b,xu.krown swpnx mi ,wc 7j.3fi4o,traight upward. The object remains in free fall until it returns to its initial i pjmn4,.xi7, wo3wc flaunch point. Which one of the following graphs could represent the velocity of the object as a function of time during its flight?
