正确答案: B
prevent
题目:It is well known that good lubrication will () the bearings from becoming overheated.
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学习资料的答案和解析:
[单选题]If () are taken at regular intervals, any unequal distribution of load will be easily found out.
differential of crank-webs
[单选题]The indicated power of an engine can be obtained by taking the ().
B and C