在动火焊接检修设备是，应办理动火证。动火前应撤除或遮盖焊接点下方和周围可燃物品和设备，以防焊接飞散出的熔渣点燃可燃物。
参考答案：对
现代医护关系模式是（）
A.主动－被动型
B.指导合作型
C.并列互补型
D.主从型
E.共同参与型
____ in the United States, St Louis has now become the 4th largest city.
A．It is the 24th biggest city
B．It was the 24th biggest city
C．Before the 24th biggest city
D．Once the 24th biggest city
