问题描述：
[单选]
The rising of the exhaust temperature in manifold pipe may NOT result from（）．
A．too great a loading
B．fouled turbocharger
C．bad combustion
D．excessive air
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答案解析：无
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答案解析：无
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上一篇：The scavenging air ports are located at（）that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position．
下一篇：The rim of the piston may contain cut-out portions to accommodate（）when they open．
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