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【判断题】
分组选配法的装配精度完全取决于零件的加工精度。
A.
正确
B.
错误
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A.
0.5
B.
1
C.
2
D.
5
E.
6
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【单选题】对于4层螺旋CT,若选择床速是10mm/周,扫描层厚5mm ,则螺旋因子为:
A.
0.5
B.
1
C.
2
D.
4
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【单选题】对于 4 层螺旋 CT ,若选择床速是 10mm/ 周,扫描层厚 5mm ,则螺旋因子为 ( )
A.
0 . 5
B.
1
C.
2
D.
5
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【单选题】对于4层螺旋CT,若选择床速是10mm/周,扫描层厚5mm,则螺旋因子为( )
A.
0.5
B.
1
C.
2
D.
4
E.
8
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