正确答案: B
6个月左右
题目:每艘船舶的磨合期长短不一,一般为()。
查看原题 查看所有试题
学习资料的答案和解析:
[单选题]汽轮机动力装置与燃气动力装置相比,其主要缺点是()。
效率低
[单选题]能反映故障概率变化情况的是()。Ⅰ.故障率λ(t);Ⅱ.密度函数f(t)
Ⅰ,Ⅱ都对
[单选题]若已知曲柄的轴线状态呈塌腰形,则其两主轴承高度必然()于相邻轴承,测得的臂距差为()值。
低/正
[单选题]The () or balance tank collects the re-circulated fuel oil.
buffer
[单选题]The cylinder cover is not provided with ().
lubricator
[单选题]The injector pump is operated by a cam which drives the () up and down.
plunger
[单选题]A thrust block is designed to().
transmit the thrust of the propeller to the vessel