【单选题】关于渠道断面的宽深比选择说法错误的是( )
【单选题】If in any doubt as to the pilot’s actions or intentions,the officer in charge of the navigational watch shall ______.
A.
notify the master immediately
B.
take whatever action is necessary before the master arrives
C.
take necessary actions at his/her discretion
D.
seek clarification [ˌklærəfɪ'keɪʃn] from the pilot
【单选题】Any ____ actions and _____ are prohibited in this state.
【单选题】He didn't seem to()any actions.
【判断题】维生素B 12 发酵传统工艺控制厌氧环境。
【判断题】辅机跳闸自动减负荷的目标值,称为RB目标值。
【单选题】If in any doubt as to the pilot’ s actions or intentions,the officer in charge of the navigational watch shall _________.
A.
notify the master immediately
B.
take whatever action is necessary before the master arrives
C.
take necessary actions at his/her discretion
D.
seek clarification from the pilot
【简答题】重合闸前加速需安装 套重合闸装置,主要用于 (填写电压等级)的发电厂或重要变电站引出的直配线上。