Anovercorrectingandunstableenginegovernoroperationisknownas（）.
A. droop
B. deadbanding
C. dashpotting
D. hunting
Onchart，bearingstonearobjectsshouldbeusedinpreferencetoobjectsfartheroff，because（）.
A. asmallerrorinbearingorinlayingitdownonthecharthasagreatereffectinmisplacingthepositionthelongerthelinetobedrawn
B. allscalesarekeptupdatedforvitalinformationbyNoticestoMariners
C. thelargerthescaleofthechart，thegreaterthedetailthatcanbeshownonit
D. themarinerusingthemediumscalechartsforpassagealongacoastneednottransferontoalargescaleforshortdistances
一家公司研究出产品配方后没去申请专利，而将配方交给总经理和工程师各持一部分保留，这种做法属于专有技术的哪一特征（）。
A. 经济性
B. 可传授性
C. 保密性
D. 历史性
Crankcaseexplosionsinpropulsiondieselresultfrom（）
A. thesplashingoflubricationoilbythecrankshaft
B. thedilutionofcrankcaseoilwithparticlesofcombustion
C. brokenfuellinessprayingoilonthecrankcase
D. theignitionofunburnedfuelandairinthecrankcase
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