航空等级货物运价是在普通货物运价的基础上附加一定的百分比的形式构成。()
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The coupon yield of a bond______.
A. is expressed as a percentage of the par value of the bond
B. is the same as the current yield
C. changes when current interest rates change
D. changes only when the market price of the bond changes
外商投资评估机构注册资本最低不得少于()美元。
A. 50万
B. 40万
C. 20万
D. 100万