[填空题]
A race car driver must aat8e 0y+qrdm0s /z q)pl2 d)ngverage 200.0 km/h over t. fu5b h8(g1cq.uyj s m9axhi6he course of a time trial lasting ten laps. If the first nine laps were done at 198.0 km/h . what average speed must be maintained for the i5u.1g8ajhmy cu6x. (qh9 sbf last lap? km/h