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【单选题】
在连接( )的大便器的塑料排水横设置清扫口。A.
一个及一个以上
B.
二个及二个以上
C.
三个及三个以上
D.
四个及四个以上
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皮皮学刷刷变学霸
举一反三
【单选题】UMS are mainly unattended overnight and during this time the ________ should have control of the main engine.
A.
chief engineer
B.
engineer on cabin watch
C.
bridge officer on watch
D.
master
【简答题】一个理想光学系统的三种放大率(垂轴放大率β、轴向放大率α与角放大率γ)三者之间的关系为 ( ) 。
【单选题】UMS are mainly unattended overnight and during this time ____ should have control of the main engine
A.
the chief engineer
B.
the engineer on cabin watch
C.
the bridge officer on watch
D.
the master
【单选题】UMS are mainly unattended overnight and during this time main engine should have control of the ________
A.
the chief engineer
B.
the engineer on cabin watch
C.
the bridge officer on watch
D.
the master
【简答题】按磁路的结构形式不同，点火线圈可分为开磁路点火线圈和闭磁路点火线圈两种。目前在独立电子点火系统中应用最广泛的是（）。
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