[填空题]
Two locomotives approacdywpnzx);3( d p/*jrijs8ct 7h each other on parakbk-s8n **zno llel tracks. Each has a speed of 95 km/h with respect to thzn*k*8 b-onk se ground. If they are initially 8.5 km apart, how long will it be before they reach each other? (See Fig. 2–30). min
