求高手解答SAT语法题一枚~Runningoutdoorsburnsaboutfivepercentmorecaloriesthanifyouare
Runningoutdoorsburnsaboutfivepercentmorecaloriesthanifyouarerunningonatreadmill,inpartthisisbecausethereisgreaterwindresistanceoutdoors.
D.runningonatreadmill,whichisinpartbecauseofthe
E.runningonatreadmill,inpartbecausethereis
E对D
inpart用法?为什么是同位语?