常见的肛周脓肿是
A．肛旁皮下脓肿
B．坐骨肛管间隙脓肿
C．直肠后间隙脓肿
D．骨盆直肠间隙脓肿
E．直肠黏膜下脓肿
参考答案：A
图是两支水平放置的温度计，且这两支温度计的两端都没有画全。你能读出它们此时的示数分别是多少吗?甲的示数为 _______℃，乙的示数为______ ℃。
A year ago a company issued a bond with a face value of $1000 with an 8 percent coupon. Now the prevailing market yield is 10 percent. What happens to the bond The:（）
A. bond is traded at a market price higher than $1000.
B. bond is traded at a market price less than $1000.
C. company has to issue a new 2 -percent coupon bond.
