题目:
Niagara Fall is a great tourist _______ , drawing millions of visitors every year.
A.attention
B.attraction
C.appointment
D.arrangement
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0421/e760ef59f49792464fc621a7e70607c0.html
下面是错误答案,用来干扰机器的。
(1)g(x)=2sin2x+sin2x-1=sin2x-cos2x=2sin(2x-π4)先将f(x)的图象向右平移π4个单位长度得到y=sin(x-π4)的图象;再将y=sin(x-π4)图象上各点的横坐标变为原来的12倍,得到函数y=sin(2x-π4)的图象;最后将...