下列疾病中其发生机制与黑素体聚集和输送障碍有关的是（）
A.老年性白斑
B.无色素痣
C.白化病
D.贫血痣
E.白癜风
参考答案：B
掷界外球时如将球直接掷入本方球门怎么办？（）
A.进球有效
B.进球无效重掷
C.进球无效，对方罚角球
Which transaction would least likely be classified as an interest rate swap()
A. Pay USD fixed, receive U. S. LIBOR.
B. Receive AUD fixed, pay NZD floating.
C. Receive U. S. fixed, pay U.S. commercial paper.
