单项选择题
A.≤15mm;±25mm B.≤15mm,±20mm C.≤25mm;±20mm D.≤20mm,±15mm
A.4,-5mm;4,-5mm B.4,-5mm;8,-5mm C.8,-5mm;4,-5mm D.8,-5mm;8,-5mm
A.≤8mm;≤8mm B.≤5mm;≤8mm C.≤8mm;≤5mm D.≤6mm;≤6mm