A.黄赤交角的存在B.大、小行星各行其道,互不干扰C.地球不均匀的公转速度D.太阳活动的频繁发生
A.a coupon bond selling at a discount to par as a result of market yields increasing after the bond was issued.B.a zero-coupon bond.C.a coupon bond selling at a premium to par.