問題詳情
5.引擎每只汽門裝二只彈簧,一大一小套合在一起,主要目的是
(A)使彈簧長度保持不變
(B)若一彈簧折斷另一彈簧尚可使用
(C)使散熱更加容易
(D)使彈簧不易發生震動而斷裂。
(A)使彈簧長度保持不變
(B)若一彈簧折斷另一彈簧尚可使用
(C)使散熱更加容易
(D)使彈簧不易發生震動而斷裂。
參考答案
無參考答案
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