在下面选项中,当鼠标指针变成哪种状态时拖动,可以将左边的图像变为右边的效果( )<img src=http://60.205.157.60/course/a@5FB0C45D49F30DF250CA8DBCFD393DFE.png style= title=image035.png/><img src=http://60.205.157.60/course/a@CB6EB75DD4BF5A069B880C7BEC28B10C.png style= title=image037.png/>
①
<img src=http://60.205.157.60/course/a@FBE3E6BD1F8C9D60127EA06F15151468.png title=image039.png alt=image039.png/>
②
<img src=http://60.205.157.60/course/a@07D2BCD62307D1086C8BEDB2CEDAAE72.png title=image041.png alt=image041.png/>
③
<img src=http://60.205.157.60/course/a@748A1F2FC43468E9E90DD706FA044333.png title=image043.png alt=image043.png/>
④
<img src=http://60.205.157.60/course/a@33A256FFAC6D680A5B77E0836538C077.png title=image045.png alt=image045.png/>