①千里之行,始于足下
②质量第一,安全第一
③打破传统,开拓进取
④人无我有,人有我优
A:①②
B:①③
C:②④
D:③④
组织是指( )
①开放自己 ②相互利用 ③持续行动 ④真诚待人
— ____ the doctors, the most beautiful teacher Zhang Lili is out of danger.
—We wish her to live a healthy and happy life in the future.
已知函数fx=ax3+bx2+cx+d的图像如图所示,则b+1a+2的取值范围是( )