高血压是遗传易感性和环境因素相互作用的结果，一般认为遗传因素所占的比例是（）
A.60％
B.40％
C.50％
D.20％
E.30％
参考答案：B
An analyst does research about calculating reinvestment income to achieve desired yield. An 8 percent coupon bond with seven years to maturity makes semiannual interest payment and has a maturity value of $1000. The bond is currently selling at $1112.96 to provide a 6 percent yield. The amount of reinvestment income required to generate this yield is closest to:（）
A. $110.48
B. $123.45
C. $226.44
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