问题描述：
[单选]
There is（）in any water cooling system for a diesel engine allowing for expansion and water make-up in the system as well as air vent and chemicals addition．
A．a setting tank
B．a service tank
C．a head tank
D．an expansion joint
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答案解析：无
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上一篇：There is an injection pump for each cylinder， which is usually operated once every cycle by（）on the camshaft．
下一篇：The working cycle of a four-stroke diesel engine consists of four events( )（）（1）compression
（2）expansion
（3）exhaust
（4）suctionThe correct sequence is
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