①C＋O₂ $\underset{\_}{\underset{\_}{点燃}}$ CO₂②Fe₂O₃＋3H₂ $\underset{\_}{\underset{\_}{高温}}$ 2Fe＋3H₂O

③Fe₂O₃＋3CO $\underset{\_}{\underset{\_}{高温}}$ 2Fe＋3CO₂

④2Fe₂O₃＋3C $\underset{\_}{\underset{\_}{高温}}$ 4Fe＋3CO₂↑

⑤CO₂＋C $\underset{\_}{\underset{\_}{高温}}$ 2CO

如图所示，有一木块A以某一速度V₀自左端冲上皮带运输机足够长的传送带上，若传送带传送带速度为V₁，则下列说法正确的是（   ）

阅读理解
(Mr. Zhang is showing Wei Fang and Li Lei a modern factory.)
Mr. Zhang: You can’t see many workers here, but you can see a lot of robots. Look, that robot has two big hands.
Wei Fang: How strong it looks!
Mr. Zhang: Yes. It does much work for us.
Li Lei: There are so many big boxes here. What are the robots doing?
Mr. Zhang: They are making fridges.
Wei Fang: How fast they are working!
Li Lei: How much time do they need to make a fridge, Mr. Zhang?
Mr. Zhang: About five minutes.
Wei Fang and Li Lei: Only five minutes! What a modern factory it is!