题目内容

数学物理方程的范畴及其分类

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用数学物理方法求解定解问题的步骤是什么

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.