一般情况下，开发区边界应与外部较敏感地域保持一定的( )距离。
A．绿化防护
B．空间防护
C．安全防护
D．卫生防护
参考答案：B
女，30岁。受凉后高热、寒战、咳嗽、咳痰3d。体检：体温38.5℃，右上肺语颤增强，有湿啰音。血白细胞18×109/L，中性粒细胞0.90，淋巴细胞O.10。最可能的诊断为（）
A.上呼吸道感染
B.急性支气管炎
C.肺炎球菌肺炎
D.急性肺脓肿
E.肺结核
A company has two $1000 face value bonds outstanding both selling for $701.22. The first issue has an annual coupon of 8% and 20 years to maturity. The second bond has the same yield as the first bond but has only five years remaining until maturity. The second issue pays interest annually as well. What is the annual interest payment on the second issue（）
A. $13.59.
B. $18.56.
C. $37.12.
