在二回路压水堆核电装置中，第二回路水的作用是什么？
战勤保障大队二氧化碳灭火剂储备数量为1000升。
战勤保障大队干粉灭火剂储备数量为1吨。
Temporary Certificates of Inspection for offshore drilling units are effective until the （）. ["Operations Manual is approved","Minerals Management Service approval is issued","classification society approval is issued","permanent Certificate of Inspection is issued"]
简述毛细线虫病的防治方法。
如何理解尊敬他人的礼仪原则？
