检验集气瓶中氧气是否充满，应将带火星的木条 请选择DCBA-D8d4R7t2a;w-W-}5D/C1m6O/v1b0H2O4@2D8M5v3p2}.z,c+I.w+}*?
A．伸入集气瓶底部2O4@2D8M5v3p2}.z,c+I.w+}*?
B．伸入集气瓶中部2O4@2D8M5v3p2}.z,c+I.w+}*?
C．伸入集气瓶口内2O4@2D8M5v3p2}.z,c+I.w+}*?
D．接近集气瓶口部2O4@2D8M5v3p2}.z,c+I.w+}*?