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【单选题】
“三星高照”作为我国古代的祝福用语，其中“三星”是指哪三星?()A.
福星、、寿星
B.
冥王星、海王星、天王星
C.
启明星、智多星、北斗星
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皮皮学刷刷变学霸
举一反三
【简答题】0试比较溢流阀、减压阀、内腔外泄式顺序阀三者之间的异同。
【简答题】试比较溢流阀、减压阀和顺序阀的异同点。
【单选题】No damage of any kind ______ aids to navigation or navigation facilities．
A.
should be done to
B.
should not be done to
C.
must be done with
D.
must not be done with
【简答题】牵拉口角向后的肌为___。
【单选题】According to the principle of operation, navigation system can be divided into instrument navigation systems, , inertial navigation systems, astronomical navigation systems and integrated navigation ...
A.
Independent navigation systems
B.
Dependent navigation systems
C.
Short range navigation systems
D.
radio navigation systems
【单选题】Navigation details including soundings, nature of the bottom, navigational marks etc. are shown in ____
A.
small-scale charts
B.
medium-scale charts
C.
large-scale charts
D.
natural scale charts
【单选题】The GPS navigation system is _____.
A.
a global navigation system
B.
a short-distance navigation system
C.
a middle-distance navigation system
D.
a long-distance navigation system
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