产生急性胰腺炎病理改变的基本始动因素（）。
A.胰管内压升高的物理性损害
B.感染性炎症
C.A+B
D.化学性炎症
E.胰腺缺血性坏死
参考答案：C
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.
下列可引起淋巴细胞绝对值增多的疾病是（）
A.流行性腮腺炎
B.猩红热
C.荨麻疹
D.库欣综合征
E.再生障碍性贫血
