患者女，54岁。发现左下牙龈菜花样溃疡2个月，无下唇麻木症状，活检诊为"鳞癌Ⅰ级"。查见溃疡3cm×2cm，小颌面顶部未触及明显肿大淋巴结。

如该患者颌骨破坏已至牙根尖水平，其治疗方案为（）

A.病变区下颌骨区域性扩大切除术+根治性颈清扫术

B.病变区下颌骨区域性扩大切除术+功能性颈清扫术

C.病变区下颌骨区域性扩大切除术定期复查，密切注意颈部淋巴结改变

D.病变侧下颌骨区段切除术+功能性颈清扫术

E.病变侧下颌骨区段切除术+根治性颈清扫术

You will load and carry a bulk cargo of sulphur at ambient temperature. Which statement is true?（）.

A.Wooden covers must be laid over the bilge wells to prevent the sulphur from entering the bilges

B.Bulk sulphur may be carried without a special permit providing the vessel complies with all applicable regulations

C.The majir charateristic of this cargo is that it forms sulfuric acid upon contact with water

D.Other hazardous material may not be stowed in the same hold as the sulphur bue may carried on deck above the hold