Crankcaseexplosionsinpropulsiondieselresultfrom（）
A. thesplashingoflubricationoilbythecrankshaft
B. thedilutionofcrankcaseoilwithparticlesofcombustion
C. brokenfuellinessprayingoilonthecrankcase
D. theignitionofunburnedfuelandairinthecrankcase
查看答案
下列哪一种情况下，C02最可能成为限制光合作用速率的主要因子（）
A. 处于光补偿点
B. 处于光饱和点
C. 处于C0补偿点
D. 处于C0饱和点
Combustionknockoccurringinadieselenginecanbecausedby（）
A. lowcoolanttemperature
B. insufficientfuel
C. highambienttemperature
D. carbonbuildupontheinjectortips
Thatthescaleofanypartofacharttobelargerthanthescaleofthesurveyis（）.
A. veryrare
B. common
C. often
D. reasonable
Whichoftheitemslistedcausesadirectactingmechanicalgovernortooperatetheenginefuelcontrollinkage?（）
A. Hydraulicoilpressure
B. Servomotoraction
C. Flyweightcentrifugalforce
D. Relaymotion
微信支付 
支付宝支付