自动报警按扭和消火栓的位置在每个消防区均不超过（）
A、10M
B、15M
C、30M
D、35M
参考答案：C
已知等腰三角形的周长为8，边长为整数，则腰长为（ ）。
What is the yield to call on a bond that has an 8 percent coupon paid annually, $1000 face value, 10 years to maturity and is first callable in 6 years The current market price is $1100. The call price is the face value plus 1-year's interest.（）
A. 6.00%.
B. 7.14%.
C. 7.02%.
