Records of tests and inspections of a cargo vessel’s fire extinguishing systems shall be kept on board（）. ["for 1 year","for 2 years","until the next Coast Guard inspection","until the vessel's Certificate of Inspection expire"]
战勤保障大队氟蛋白泡沫储备数量为5吨。
简述毛细线虫病的症状和病理变化。
楷书成熟于（） ["魏晋","隋唐","明初","清末"]
战勤保障大队封闭式防化服储备数量为5套。
中国现代礼仪是从什么时候开始形成的？
