Which of the following is the reason that the metacentric height is a valid measure of only the initial stabilit?（）. ["The metacenter does not remain in the same position for large angles of inclination","The center of gravity shifts due to inclination","The center of gravity shifts above the metacenter as the vessel is inclined","The mean draft will change as the vessel is inclined"]
依法成立的保险合同，自成立时生效。
诚信教育普及阶段中，针对理念的是（） ["提升阶段","自律阶段","规范阶段","奖惩阶段"]
证券交易当事人买卖的证券必须采用纸面形式。
公务员与国家和政府关系的本质体现是（） ["A.公","B.实","C.俭","D.廉"]
指配频带（不涉及空间电台）的带宽是必要带宽加上（）的两倍。
