7.下列信用证条款，要求卖方负担有关费用的是：（） A: Allbankingchargesforseller’saccount. B: Portcongestionsurcharges,ifany,atthetimeofshipmentisforopener’saccount. C: AllbankingchargesoutsideHongKongareforaccountofaccountee. D: Draweebank’schargesandacceptanceareforbuyer’saccount.