先天性心脏病室间隔缺损（）
A.心尖部抬举性搏动
B.心前区收缩期搏动
C.心底部抬举性搏动
D.胸骨上窝抬举性搏动
E.右颈部异常搏动
参考答案：B
Don't make so much noise. The children _____ an English lesson. [ ]
A. have
B. are having
C. were having
按照道路运输企业等级评定标准，二级以上客货运输企业营运车辆新度系数必须达到（）以上。
A．0.4
B．0.5
C．0.6
D．0.7
