七年级上册数学计划简介：A battleship, forty-eight small guns, and two heavy Hongyi cannons, once fired, must be earth-shattering. It is no exaggeration to say that it is a mobile gunpowder magazine.
A battleship, forty-eight small guns, and two heavy Hongyi cannons, once fired, must be earth-shattering. It is no exaggeration to say that it is a mobile gunpowder magazine.
