皮皮学，免费搜题
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【单选题】
某减速器转轴两端安装深沟球轴承，该轴承承受一个大小和不变的径向负荷，内圈旋转，外圈不旋转，则内圈相对于负荷方向的运转状态为( )。A.
固定的内圈负荷
B.
旋转的内圈负荷
C.
摆动的内圈负荷
D.
摆动或旋转的内圈负荷
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】Would you mind helping me?
A.
What can I do for you?
B.
I have no idea.
C.
Sorry, I'm busy now.
D.
I would love to.
【单选题】The Egyphan boat continued to approach the American ship probably because
A.
the Egyptians thought it was OK to approach military vessels.
B.
the ship was a civilian vessel and caused misunderstanding.
C.
the Egyptians did not understand the words of warning.
D.
no warning flare was fired by the U. S. navy on the ship.
【单选题】The wind was so strong last night that is tore the ______ of the ship into two or three pieces.
A.
mask
B.
mine
C.
sail
D.
satellite
【单选题】______ is the offense against navigational rules and will make the ship unseaworthy with the Shipowner responsible for all the consequences．
A.
Overloading
B.
Overtaking
C.
Overboarding
D.
Overlining
【单选题】按照压力分类，阀门可分为真空、低压、中压、高压和超高压阀门，其中低压阀门的压力为（）
【简答题】按流体压力分类，阀门可分为真空阀、低压门、（）和（）。
【单选题】The permanent dunnage attached to the frames of the ship that aids in ventilation is（are）the ______．
A.
hatch boards
B.
tank top
C.
hatch beams
D.
sweat battens
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