用于水泥混凝土路面板块修补的材料，应达到哪些技术要求？
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If at any time the officer in charge of the navigational watch is to be relieved when a manoeuvre or other action to avoid any hazard is taking place,（）.
A. the relief of that officer shall be made prior to such action has been completed
B. the relief of that officer shall never be made
C. the relief of that officer shall be deferred until such action has been completed
D. the relief of that officer shall be made by the captai
（）不到位禁止施工。
A. 施工负责人
B. 监控人员
C. 配合人员
D. 驻站联络员
E. 安全防护员
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