(1)计算:(7x2y3﹣8x3y2z)÷8x2y2;
(2)解分式方程:2xx+1+3x-1=2.
如图所示,从某高度水平抛出一小球,经过时间t到达地面时,速度与水平方向的夹角为θ,不计空气阻力,重力加速度为g.下列说法正确的是( )
假如你是Jack,请你根据表格信息,介绍一下你们一家三口的一日三餐。要求语句通顺,要点全面,书写规范,词数50—60词左右。
breakfast
lunch
dinner
father
eggs and apples
chicken, salad and rice
mother
eggs and milk
tomatoes, rice and salad
rice and vegetables
Jack
bread, milk and fruit