
【名词&注释】
障碍物(obstacle)
[单选题]According to the passage, we can infer that the pole piece diameter must be tooth height.
A. as same as
B. much less than
C. much more than
D. not confirmed
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举一反三:
[单选题]_____ of the controllable pitch propeller enables the blades to be moved to change the pitch angle
A. An external mechanism
B. An internal mechanism
C. An interlock device
D. A hunting gear system
[单选题]海上待救时,艇筏集结相互间间距为:
A. 10~20米
B. 20~30米
C. 30~40米
D. 40~50米
[单选题]()期间应检查管系、阀门是否有泄漏;透气系统是否处于设定状态;未装货舱也应检查,防止阀门开错或泄漏。
A. 开始装货
B. 开始卸货
C. 开始加温或冷却
[单选题]锚泊中从事疏浚作业的船舶,在白天应显示____。
A. 球、菱形、球垂直三个号型
B. 可通过的一舷,垂直两个球体,存在障碍物一舷,垂直两个菱形体
C. 锚球
D. A+C
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