应急救援组织机构应包括，应急处理行动组、通信联络组、疏散引导组、安全防护救护组等。
参考答案：对
---John is said to have learned Italian in Italy for five years.
---_______ he speaks it like a native speaker.
A．No doubt
B．No problem
C．No wonder
D．No curiosity
具有消除体内自由基和过氧化物作用的营养素是（）
A.钙
B.铁
C.硒
D.碘
