Leaky exhaust valve will result in which of the following?（）
(1) high exhaust temperature;
(2) low compression pressure;
(3) low firing pressure.
A.(1) and (2)
B.(1) only
C.(2) only
D.(1),(2) and (3)
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A.cylinder liners and piston rings
B.main bearings
C.crankpin bearings
D.turboblower
A.well ventilated
B.well clean
C.in good order
D.more room
A.present
B.prevent
C.avoid
D.provide
A.is scavenged
B.has been scavenged
C.be scavenged
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A.is scavenged
B.is atomized with fuel oil
C.be scavenged
D.be atomized with fuel oil
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