碳、铁丝、蜡烛在氧气中燃烧的共

碳、铁丝、蜡烛在氧气中燃烧的共同现象是 请选择DCBA9J)h/F'E)E:`0f.G/J3}9x4Z'~2I,?0m

A．都有气体生成.G/J3}9x4Z'~2I,?0m

B．都能发热.G/J3}9x4Z'~2I,?0m

C．都有淡蓝色火焰.G/J3}9x4Z'~2I,?0m

D．都有水生成.G/J3}9x4Z'~2I,?0m