His methods are regarded as the of working by his leaders and workmates.
A:base
B:based
C:basic
D:basing
如上右图所示,一束光从空气斜射到某液面上发生反射和折射,入射光线与液面成30°角,反射光线与折射光线的夹角为83°,则反射角的大小为____ °,折射角的大小为____ 。
正在水平面上滚动的小球,如果它受到的外力同时消失,那么它将( )
函数y= x+1 + 12−x 的定义域是____.
已知点A(﹣2,n)在抛物线y=x2+bx+c上.