能自由行发光的物休叫做光源，下列物体属于光源的是（ ）
A．太阳
B．地球
C．月亮
D．玫瑰花
答案：A
Given a required yield to maturity of 6 percent, what is the intrinsic value of a semi-annual pay coupon bond with an 8 percent coupon and 15 years remaining until maturity（）
A. $1196.
B. $1202.
C. $1095.
