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单项选择题
A.6mm
B.8mm
C.10mm
D.12mm
单项选择题
A.+5,-2mm
B.±4mm
C.+6,-3mm
D.+7,-4mm
单项选择题
A.2mm
B.4mm
C.6mm
D.8mm
单项选择题
A.3mm
B.5mm
C.8mm
D.9mm
单项选择题
A.2mm
B.4mm
C.6mm
D.8mm
单项选择题
A.1mm
B.2mm
C.3mm
D.4mm
单项选择题
A.+2,-2mm
B.+4,-4mm
C.+6,-2mm
D.+6,-4mm