斯特劳斯的《蓝色多瑙河》属于哪种体裁？（）
A.舞剧
B.交响曲
C.协奏曲
D.圆舞曲
参考答案：D
If market interest rates rise, the price of a callable bond, compared to an otherwise identical option-free bond, will most likely decrease by:()
A. less than the option-free bond.
B. more than the option-free bond.
C. the same amount as the option-free bond.
总脱碳层的测定一般选取的放大倍数为（）倍。
A.100
B.500
C.1000
