（四）违反有关法律法规规定，升放携带明火的升空物体，有发生火灾事故危险，不听劝阻的；
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Number (17): Everything in this space must add up to 17. The answer is 4-5, placed horizontally; 6-6, placed horizontally.
The Web streams spec requires promise creation at numerous points — often in hot paths and often invisible to users. Each read() call doesn't just return a promise; internally, the implementation creates additional promises for queue management, pull() coordination, and backpressure signaling.
Source: Computational Materials Science, Volume 266