要说姚明,谁都知道,NBA运动员。可是,要说姚明明,你可能不知道,但在我们学校可是闻名于世啦。他就是我们的数学老师。 姚老师个子不太高,但就像相声演员潘长江那样,浓缩的都是精华,姚老师很爱笑,像个孩子般天真、快乐,但是姚老师要生气起来,也很恐
math The high, middle, and Angle bisector of the triangle is the main line, in the triangle and triangle on the Angle of inside and outside. Teaching experiments for students to understand the stability of the triangle, in know the inside
math exercise是可数的。主要分两种情况:1.exercise泛指“锻炼”时,做不可数名词,如:take exercise 锻炼身体 take more exercise多锻炼2.exercise表示体操或练习题时是可数名词,要用复数形式.如: do morning exercises(做早操)