问题描述：
[单选]
The cooling water jacket is common to all the cylinders but there are often（）to ensure that each cylinder receives the right amount and flow of water．
A．dividing walls
B．divided walls
C．dividing liners
D．divided jacket
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答案解析：无
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上一篇：The cooling water temperature（）over a period of 8 hours， and then shut down．
下一篇：The cooling water is in direct contact with the outer surface of the liner as a result of which it is termed a（）．
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