问题描述：
[单选]
A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the（）（1）MEP is lower and the scavenging air is cooling the exhaust gases
（2）valve overlap in a four-stroke
A．(1) only is correct
B．(2) only is correct
C．both (1) and (2) are correct
D．Neither (1) or (2) are correct
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答案解析：无
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