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问题

In order to control thermal stresses, some types of modern engines use pistons with .A.hea


In order to control thermal stresses, some types of modern engines use pistons with .

A.heavy wall and intensive cooling

B.heavy wall and no cooling

C.thin wall and no cooling

D.thin wall and intensive cooling

请帮忙给出正确答案和分析,谢谢!

参考答案
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