利用超声方法进行测距的误差在（ ）。
A．5%左右
B．10%左右
C．1%左右
D．0.5%左右
E．没有误差
参考答案：A
On hearing the shocking news, ______ that she stood there for quite a while speechless. [ ]
A. Sue was too excited
B. so excited was Sue
C. excited was Sue
D. too excited was Sue
患者，60岁，男性。急性心肌梗死后6个月，出现严重心绞痛，血压20．0／12．7kPa（150／95mmHg），V3～V5ST段持续性抬高；X线可见心脏有反常搏动。诊断为（）
A.梗死后心绞痛
B. * * 肌功能不全
C.室壁瘤
D.再发心肌梗死
E.梗死后综合征
