Areciprocatingpumpbelongsto（）accordingtoitsworkingprinciple.
A. injectorpumps
B. positivedisplacementpumps
C. centrifugalpump
D. centripetalpumps
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Injuriesresultinginlossoflifeorincapacitation，aboardvessels，mustbereportedtothe（）.
A. MOC
B. CCS
C. MSAOFCHINA
D. InternationalAssociationofNavigation
Personswhohaveswallowedanon-petroleumbasedpoisonaregivenlargequantitiesofwarmsoapywaterorwarmsaltwaterto（）
A. inducevomiting
B. absorbthepoisonfromtheblood
C. neutralizethepoisonintheblood
D. increasethedigestiveprocessandeliminatethepoison
Whatisthepurposeofareliefvalve?（）
A. tofill2tanksatthesametime
B. tousepumpatahigherpressure
C. toreturnliquidtosuctionsideifdischargevalveisclosed
D. Alloftheabovearetrue
单谐振回路谐振放大器的短形系数K0.1等于（）。
A. 2.35
B. 3.15
C. 10
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