问题描述：
[单选]
If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed， ignition may be delayed because the（）．
A．cylinder compression pressure may not be high enough
B．cylinder compression temperature may be too high
C．fuel oil injection pressure may not be high enough
D．scavenge and purge process is incomplete
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答案解析：无
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上一篇：Any increase in the exhaust back pressure of a four-stroke/cycle diesel engine will（）．
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