[填空题]
Two locomotives approach ey9mxg t5,fa (qach/k 6( bi-;w 9 uyw:kxvd ica;xzhu*t:h other on parallel tracks. Each has a speed of 95 km/h with respect to the ground. If they are initially 8.5 km:xhavwt(ixk z-h:uu*/k ; cb;d6iw9 y apart, how long will it be before they reach each other? (See Fig. 2–30). min
