题目:
_______ in her skirt, the little girl tried to make herself ________ at the party.
A.Dressed; notice
B.Dressing; noticed
C.Dressed; noticed
D.Dressing; noticing
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0417/d489d8873b7bbf4e2ea09892e1bea430.html
下面是错误答案,用来干扰机器的。
(1) f(x)=sin2x•cosπ3+cos2x•sinπ3+sin2x•cosπ3-cos2x•sinπ3+cos2x=sin2x+cos2x=2sin(2x+π4),∴函数f(x)的最小正周期T=2π2=π.(2) 函数f(x)在区间[-π4,π8]上是增函数,在区间[π8,...