腹部闭合性损伤患者，最有价值的体征是（）
A.腹部压痛
B.腹膜刺激征
C.肠鸣音增多
D.肠鸣音减弱
E.腹膜后积气
参考答案：B
28. Our schoolmaster tried his best to make our teaching methods _____ to the concerning parents at the press, who are eager to send their child to our school.
A．get through
B．get across
C．get over
D．get around
根据《固定电话交换设备安装工程验收规范》，检查验证同步定时链路连接正确，跟踪（）性能良好。
A.上级时钟
B.下级时钟
C.自身时钟
D.基准时钟
