Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?（）<br>A:Leaking seal ring<br>B:Insufficient heat transfer from the exhaust valves<br>C:Block cooling water passages to the head<br>D:Excessive scavenging air provided to the engine

Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?（）
A:Leaking seal ring
B:Insufficient heat transfer from the exhaust valves
C:Block cooling water passages to the head
D:Excessive scavenging air provided to the engine

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