保安员的基本条件是年满16岁，身体健康，品行良好，具有初中以上学历的中国公民并取得保安员证。
参考答案：错
.--- I’m sorry I stepped outside for a smoke. I was very tired..
--- There is no ________ for this while you are on duty.
A．reason
B．excuse
C．cause
D．explanation
先天性心脏病患儿心前区隆起多提示左心室扩大，日久可致胸廓畸形。()
