6个数复式三中二多少组怎么算

简介：For six days in a row, Qining was thinking about the contents of Zhu Cixiang's booklet even when he was sleeping. When he got up every morning, he immediately went straight to the production workshop of the gunpowder factory. The gunpowder factory is a place where fireworks are strictly prohibited. There is no production at night, and no one is allowed to live in the factory. Qining lives in the alley opposite the gunpowder factory.