Thefilmofoilbetweentheringsandthelinerisnotonlyessentialforthelubricationbutalsoplaysanimportantpartinachieving（）.
A. anoilseal
B. removingheat
C. agasseal
D. coolingthepiston
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BeforeaMasterrelievesaPilotoftheconn，the（）.
A. Mastershouldforeseeanydangertothevesselonthepresentcourse
B. vesselmustbeinextremis
C. Mastershouldagreetosignareleaseofliabilityform
D. MastermustfirstrequestthePilottotakecorrectiveaction
下列各项中属于我国私募股权基金发展现状的是（）
A. 投资策略多样化
B. 金融市场低杠杆化
C. 融资环境发生变化
D. 监管态度发生变化
Datarelatingtothedirectionandvelocityofrotarytidalcurrentscanbefoundinthe（）.
A. Mariner'sGuide
B. TidalCurrentTables
C. NauticalAlmanac
D. TideTables
Thefour-strokeengineisusedfor（）andsometimesformainpropulsionwithagearboxtoprovideapropellerspeedofbetween90to120rev/min.
A. alternator
B. turbo-charger
C. remotecontroller
D. windlass
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