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用数学物理方法求解定解问题的步骤是什么

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更多问题

那张桌子上有一把锤子吗?

A. Is there a vase on that table?
B. Is there a hammer on that table?

那个罐子里有一些烟丝吗?

A. Is there any tobacco in that tin?
B. Is there some tobacco in that tin?

那个盘子里没有奶酪。

A. There isn't any sugar in that plate.
B. There isn't any cheese on that plate.

那个衣柜里没有套装。

A. There aren't any suits in that wardrobe.
B. There aren't some suits in that wardrobe.