题目

阅读理解Imaginereading a story titled Pursuing Success. That would be an inspiringstory, wouldn't it? Maybe—but maybe not. It might well be the story of someonewhose never-ending chase for more and more success leaves them unsatisfied andincapable of happiness. Thoughit isn't a conventional medical addiction, for many people success hasaddictive properties. Obviously, success goes with praise. To a certain extent,praise stimulates the neurotransmitter dopamine (神经递质多巴胺), which contributes to all addictive behaviors. Thedesire for success may be born to human nature, but spe把y=sin2x的图象上所有点的横坐标扩大到原来的二倍，纵坐标保持不变，然后再把图象向右平移个单位，得到新的函数图象，其解析式为 　[　　]