陈庆望着(zhe)一(yi)双双正在(zai)思索的目光(guang),又继续笑道:原(yuan)因很(hen)简单,空气受(shou)热(re)了它就会向上走(zou),孔明灯(deng)里的空气受热,热(re)空气(qi)就把(ba)孔明灯托起(qi)来(lai)飞了,跑马灯(deng)也一样,顶(ding)部被堵(du)住,热空气(qi)出(chu)不去,它就会(hui)向旁边流去,使跑马灯转动起来(lai),我刚才(cai)说(shuo)的这些,听(ting)懂(dong)的请举(ju)手(shou)!
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