“四紧”工作的具体内容是：拧紧（）（道钉）和接头螺栓，装紧防爬器及支撑。
A. 轨枕螺栓
B. 铁垫板
C. 夹板
D. 扣件
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第三代移动通信系统主要特点是本地漫游。
A. 正确
B. 错误
党的群众路线教育实践活动主要任务聚焦到（）上。
A. 作风建设
B. 思想建设
C. 制度建设
为了保证物件在吊运中平稳，吊钩中心与物体重心直在同一垂直线上。
A. 正确
B. 错误
A seaman you have just discharged has a Continuous Discharge Book. Which statement is TRUE? （）
A. The record of entry in the continuous discharge book shall agree with the entry made in the Ship's Articles.
B. If the vessel was on coastwise articles，the record of discharge will be made in the Official Logbook.
C. An entry should be made in the book and a Certificate of Discharge issued to the seaman.
D. A Certificate of Discharge form should be attached to the book
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