物流规划需要考虑企业内供应链的整体效益，以追求（ ）为目标。
A．单项成本最优
B．系统总成本最优
C．某部门效益
D．某项物流活动的效益
参考答案：B
单词拼写。
1. Trees along the road provide ____ (遮蔽) from the sun for the farmers.
2. As e____ was cut off, they had to use candles instead.
3. The poor man was badly i____ in the train accident.
4. The ____ (受到惊吓的) girl was speechless after she saw the terrible scene.
5. More than 90 percent of the houses were badly ____ (损坏) by the flood.
镶有装饰性银花的牛骨制的梳子
