解答:解:①-52=-25,(-5)2=25,互为相反数;②(-3)2=9,-32=-9,互为相反数;③-(-0.3)5=0.35,故③相等;④0100=0200,故④相等;⑤(-1)3=-1,(-1)2=1,故⑤互为相反数;故选:B.