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【单选题】
下列标准件中,能够防止轴或轴上零件的轴向移动的 是 ( ) 。
A.
轴用弹性挡圈
B.
孔用弹性挡圈
C.
圆螺母止动垫圈
D.
以上都不是
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【单选题】In the last two hundred years there have been great changes in the method of production of goods. This is now also true of the building industry; for mechanization has been introduced. System building...
A.
the latter uses ready-made internal features
B.
panels are cast in a level position
C.
the former is used to build walls and floors while the latter to construct bathrooms or bedrooms
D.
the former is more expensive than the latter
【单选题】RPI卡环组中能够防止义齿的垂直向脱位，起到固位作用的部件除了Ⅰ型杆外，还有（）
A.
邻面板
B.
近中支托
C.
铸造腭杆
D.
Ⅰ型杆
E.
固位指
相关题目：
【单选题】In the last two hundred years there have been great changes in the method of production of goods. This is now also true of the building industry; for mechanization has been introduced. System building...
A.
the latter uses ready-made internal features
B.
panels are cast in a level position
C.
the former is used to build walls and floors while the latter to construct bathrooms or bedrooms
D.
the former is more expensive than the latter
【单选题】RPI卡环组中能够防止义齿的垂直向脱位，起到固位作用的部件除了Ⅰ型杆外，还有（）
A.
邻面板
B.
近中支托
C.
铸造腭杆
D.
Ⅰ型杆
E.
固位指
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