正确答案: D
D.Ⅰ+Ⅲ+Ⅴ
题目:活塞杆填料函安装在气缸底板中心孔中,具有()的作用。Ⅰ.密封扫气空气;Ⅱ.密封燃气;Ⅲ.除油污;Ⅳ.除积炭;Ⅴ.分隔。
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学习资料的答案和解析:
[单选题]常用的船舶防污染设备有()。
A+B+C
[单选题]橡胶艉轴承材料是由天然橡胶与矿物成分硫化加工制成,具有()等优点。Ⅰ.耐热;Ⅱ.耐油;Ⅲ.弹性好;Ⅳ.吸振性好;Ⅴ.耐磨。
Ⅲ+Ⅳ+Ⅴ
[单选题]A-frames and cylinder block is held together by () to form a rigid structure.
tie rods
[单选题]Fuel oil is pumped by means of () from the bunker tanks.
a transfer pump
[单选题]The cylinder and piston must be warmed up () to a temperature of about 140 degF in standing by engine.
gradually
[单选题]If your propeller is racing in rough weather,you should().
decrease your engine speed
[单选题]Most medium and slow speed diesels are started by what medium?()
Compressed air