英语四级阅读 Motorbike ambulances put into use in Beijing

　　Photo taken on Dec. 31, 2008 shows the sign of first aid printed on a motorbike ambulance at an emergency center in Beijing, capital of China. Twenty motorbike ambulances were put into use in Beijing on Wednesday.

　　Ambulancemen drive motorbike ambulances out of an emergency center in Beijing, China, Dec. 31, 2008.

　　An ambulanceman shows first aid and communication equipment installed with the motorbike ambulances at an emergency center in Beijing, China, Dec. 31, 2008.
　　Photo taken on Dec. 31, 2008 shows the sign of first aid printed on a motorbike ambulance at an emergency center in Beijing, capital of China. Twenty motorbike ambulances were put into use in Beijing on Wednesday.