如图所示,一半径为R=2m的圆环,以直径AB为轴匀速转动,转动周期T=2s,环上有M、N两点.试求:
例:If I were in your position,I would pay close attention.
→Were I in your position,I would pay close attention.
根据下表,确定方程ax2+bx+c=0的一个解的取值范围是( )
x
2
2.23
2.24
2.25
ax2+bx+c
﹣0.05
﹣0.02
0.03
0.07
进入青春期,同学姐开始在意自己的体态和容貌,有人为自己个子矮而自卑,有人为长得丑而烦恼。对此,我们正确的做法是( )
①接受现实,学会欣赏自己 ②勇于正视不足,正确看待自己
③消除烦恼,悦纳自己 ④引人注目,孤芳自赏