Thepistoncoolingsystemmayemploysimilarcomponents,exceptthatadraintankisusedinsteadofaheadtankThatmeansthissystem().
A. doesntuseadraintankbutaheadtank
B. usesadraintanknotheadtank
C. usesadraintankandaheadtank
D. usesneitheradraintanknoraheadtank
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Amarinechemistissuesgasfreecertificatesandiscertifiedbywhichorganization?()
A. MineSafetyApplianceAssociation
B. AmericanChemicalSociety
C. MarineChemistsAssociation
D. NationalFireProtectionAssociation
Amessagebyflashinglightconsistsofthecall,theidentity,thetext,andthe().
A. destination
B. answer
C. time
D. ending
随着庄园制的逐渐瓦解,室町幕府的土地所有制、阶级关系也发生了变化。镰仓时期的那种御家人的主从关系发生变化,()成为了统治层的实力派。
A. 将军
B. 天皇
C. 守护大名
D. 武士
Theplungerinthefuelinjectorpump,usuallyoperatedbya(),isdrivenupanddownwhenworking.
A. crankshaft
B. camshaft
C. pistonrod
D. rackandpinion