上腹部绞痛，寒战高热、黄疸，最常见于
A．胆总管囊肿B．急性胆囊炎C．先天性胆道闭锁D．胆道蛔虫病E．胆总管结石合并感染
参考答案：E
一个长方体的长、宽、高分别为正整数a，b，c，而且①ab-ca-bc=1，②ca=bc+1，试确定长方体的体积______．
Questions 11-14
A．Its bedrooms are specious.
B． Its rent is quite reasonable.
C．It is located in a good position.
D．It is well furnished.
