常州三井小学安装有太阳能发电站，基本结构和5月初电能表的示数如图甲所示；5月底电能表的示数如图乙所示．问:
—The player looks better because the coach has got her every day.
— Yes, practice makes perfect.
下来有关实验基本操作，正确的是（ ）
— do you prepare for an exam?
—By reviewing all the notes.
某商品按标价的七折销售可以获利25元，已知该商品进价为50元，则标价为多少元？（只需列方程，不需要解答）
