---We are leaving today. I’d like to______now. -May I have you name and your room number, please - Mr. black in room 714.

①、有较大向内卷边的漏洞；②、有小型突出物的船壳裂口；③、用木塞、木楔堵后仍有不规则缝孔的漏洞
A. ①、②
B. ①、③
C. ②、③
D. ①、②、③

①、水密舱壁；②、双层底；③、水密门、窗；④、船壳板上的进排水孔设置的自动止回阀
A. ①、②、③
B. ①、②、④
C. ①～④
D. ②、③、④