( )是第三方物流的明显特征，也是同业者之间差别化的武器。
A．先进的物流技术
B．先进的物流设备
C．信息系统的充实
D．低廉的成本
参考答案：C
建设项目竣工环境保护验收时，振动监测点应置于建筑物室外（）振动敏感处。
A.0.5m以内
B.1m以内
C.1.5m以内
D.2m以内
How does the price-yield relationship for a callable bond compare to the same relationship for an option-free bond The price-yield relationship is:（）
A. concave for low yields for the callable bond and always convex for the option-free bond.
B. concave for an option-free bond and convex for a callable bond.
C. concave for the callable bond and convex for an option-free bond.
