正确答案: A
刚性
题目:底脚螺栓与机座和底座的连接方式是()连接。
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学习资料的答案和解析:
[单选题]废气锅炉的排气流动阻力不能过大,因为二冲程低速柴油机增压器后的排气背压规定一般不宜超过()。
A,B,C均可
[单选题]排气阀阀面磨损较轻时可进行()使阀线恢复。
研阀
[单选题]双轴系具有高速、()和()的特点。
机动性好/生命力强
[单选题]一般()采用双轴系的推进系统。Ⅰ.油船;Ⅱ.拖船;Ⅲ.客船;Ⅳ.军舰;Ⅴ.集装箱船。
Ⅲ+Ⅳ
[单选题]A cast steel strong back is fitted in way of the combustion space to help absorb ().
gas force
[单选题]The injector pump is operated by a cam which drives () up and down.
the plunger
[单选题]The rim of the piston may contain cut-out portions to accommodate () when they open.
the valves