After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）. ["hoist man","limit switch","brake handle","preventer bar"]
下列关于生物分子电子技术错误的是（）。 ["生物分子电子技术是利用生物分子信息材料装配电子元件和仪器的技术","生物分子电子技术在武器装备的信息化、微型化、智能化过程中将起到重要作用","目前已经研制出可装入计算机的高密度生物电子存储器的产品","美国国防高级研究计划局把生物分子电子技术看成是能使未来作战发生革命性变化的技术之一"]
小灵通维修之后，要请客户当场试机，确认无故障情况后，由客户在（）上签字。 ["A.协议书","B.维修申请","C.工单","D.维修记录"]
被吊销食品生产、流通或者餐饮服务许可证的单位，其直接负责的主管人员自处罚决定作出之日起（）年内不得从事食品生产经营管理工作。违反法律规定，受到刑事处罚或者开除处分的食品检验机构人员，自刑罚执行完毕或者处分决定作出之日起（）年内不得从事食品检验工作。 ["3；5","5；10","5；5"]
Deck machinery, which is also known as hull machinery, includes all power driven equipment located （）the machinery spaces that is （） with the main propulsion plant. ["inside；associated","inside；not associated","outside；associated","outside；not associated"]
烧结矿的化学性质指的是什么？
