第四方物流的优点集中表现在可以迅速、高质量、低成本地完成各种服务。（）
参考答案：对
眼球中起"暗房"作用的是
A．视网膜B．角膜和巩膜C．角膜D．巩膜E．葡萄膜
When two fire hose teams are attacking a fire they should（）.
A.use different fire hose pressures
B.use fire hoses of different sizes
C.not attack the fire from opposite sides
D.not wear protective clothing
