扑救高层建筑火灾，前沿指挥所应设在（）
A、着火层
B、着火层下一层或下二层
C、首层
D、着火层上一层或上二层
参考答案：B
联系上下文，补全对话。
Lucy: ___________ ___________ a birthday in June?
Sarah: Me.
Lucy: What's the ___________?
Sarah: It's June 1st.
Lucy: Oh, It's ___________ Day.
Sarah: ___________ is your birthday?
Lucy: It's October 15th
良性肿瘤的主要治疗手段是
A．药物治疗
B．放射疗法
C．手术治疗
D．生物治疗
E．中医中药治疗
