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【单选题】
船员职务规则规定,三副的基本职责应包括________。I.负责配置救生衣,发现损坏及时修复、更新;II.管理火警报警系统;III.按时向大副提出所管设备的保养计划;IV.负责制定救生艇起落操作规程。
A.
Ⅰ～Ⅳ
B.
Ⅰ～Ⅲ
C.
Ⅰ、Ⅱ、Ⅳ
D.
Ⅱ、Ⅲ、Ⅳ
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【单选题】如下两幅图所示，由左上图中的选区状态切换到右下图的快速蒙版状态，应使用键盘上的哪个字母键（软件默认状态下）？【图片】
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【单选题】如下两幅图所示，由左上图中的选区状态切换到右下图的快速蒙版状态，应使用键盘上的哪个字母键（软件默认状态下）？【图片】
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