当把安全带挂在机舱顶部的轨道处时,不要挂在双支撑的后部,只可以挂在两个单支撑之间。
正确
暂无解析
CollinsCOBUILDEnglishLanguageDictionary(1987)hassomeuniquefeaturessuchasdefinition,extracolumnand______.
中国自20世纪60年代开始进行海洋油气资源的自营勘探和开发。()
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