【多选题】
地球的资源是有限的，要使人类的财富持续增长，就必须（）
①
A实现污染排放最小化、废弃物资源化和无害化
②
B实行循环经济
③
C改变经济增长方式
④
D以最小成本获得最大的经济效益和环境效益
【单选题】
已知各期环比增长速度分别为2%、5%、8%以及7%，则相应的定基增长速度的计算方法为( )。
①
(102%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>105%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>108%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>107%)-100%
②
102%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>105%x108%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>107%
③
2%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>5%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>8%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>7%
④
(2%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>5%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>8%<img width="10" height="17" src="/jxpt-web/static/3rdlib/UEditor/themes/default/images/spacer.gif"/>7%)-100%