A:standing u
B:breaking dow
C:going u
D:putting u
函数y=sin(2x+5π2)图像的一条对称轴方程是( )
设a,b为两条直线,α,β为两个平面,下列四个命题中真命题是 ( )
移栽幼苗时,一般要带土移栽,这是为了( )
——What do you often do_______ classes to relax yourselves?——We often do eye exercises, listen to music or do some running around the school.