单选题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) onlyC(2) onlyD(1),(2) and (3)
单选题
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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