正确答案: C

各轴承的负荷在允许值内且合理分配，轴段内的应力、弯矩、转角均在允许值内或取合理数值

题目：按合理校中原理校中时，下述正确的是（）。

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学习资料的答案和解析：

[单选题]故障率λ（t）是针对到时刻t尚能正常工作的产品数而言的；（）.Ⅱ.密度函数f（t）是针对开始时刻的产品数而言的

Ⅰ，Ⅱ都对

[单选题]（） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.

An air distributor

[单选题]Each cylinder is closed at the top by a （）, made of a special heat-resistant steel.

cylinder cover

[单选题]The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.

brake horsepower