狭义的流通指商品的流通,它主要克服了使用权间隔、场所间隔和时间间隔。
参考答案:错
下列自然资源的开发利用中,不涉及化学反应的是( )
A.从海带等海产品中获得单质碘
B.用铝土矿冶炼金属铝
C.将原油分馏得到石油气、汽油等产品
D.将煤干馏得到焦炭、煤焦油等
Which of the following statements best describes the concept of negative convexity in bond prices As interest rates:()
A. fall, the bond’s price increases at an increasing rate.
B. rise, the bond’s price approaches a minimum value.
C. fall, the bond’s price increases at a decreasing rate.