如本症无合并畸形，适宜的治疗手段是
A．药物治疗十介入治疗
B．介入治疗
C．药物治疗
D．体外循环直视手术
E．全麻闭式手术
参考答案：B
School children must be taught how to deal with dangerous _________．
A．states
B．conditions
C．situations
D．positions
荀子及《荀子》
