A.2%B.4%C.3%D.10%
A.鐵扁擔(dān)B.鐵爬釘C.鐵銀錠D.鐵吊架
A.秦漢時(shí)期B.春秋戰(zhàn)國(guó)時(shí)期C.唐宋時(shí)期D.魏晉南北朝時(shí)期