题目内容

Theheartofthedieselengineisthe()wherethefuelisburntandthepowerdeveloped.

A. crankcase
B. cylinder
C. scavengebox
D. piston

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Keep()tothatpoint,saidthepilot.

A. straight
B. direct
C. forward
D. on

在结焦末期,荒煤气中的主要成分是()

A. H
B. CH
CO

Thehotexpandinggasrotatesthebladesoftheexhaustturbine,thusgivingoutlargepartofitspower,whichdrives().

A. theoilseparator
B. thefreshwatergenerator
C. thecompressor
D. firepump

直立火道焦炉可以分为()

A. 两分式(包括四分式)焦炉
B. 过顶式焦炉
C. 单联式焦炉
D. 双联式焦炉

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