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P点即为所求.
“农奴先笑了,后来又哭了;地主先哭了,后来又笑了.”这句话描述的情景最有可能发生在下列哪一事件中( )
读一读,选择正确的答案,将字母代号写入前面的括号内。
① Is he nine? ____ A. Yes, I am.
② Are you a boy?____ B. I'm a cow.
③ Are you two? ____ C. I'm four.
④ How old is your sister? ____ D. She is ten.
⑤ Who are you?____ E. Yes, he is.
该函数模型如下:
f(x)={44.21sin(π3x)+0.21,0≤x<254.27⋅e−0.3x+10.18,x≥2
根据上述条件,回答以下问题:
(参数数据: ln9.82≈2.28 , ln10.18≈2.32 , ln54.27≈3.99 )