单项选择题
A.≥26mmB.≥28mmC.≥30mmD.≥23mm
A.≤2.5mmB.≤1.5mmC.≤1.0mmD.≤2.0mm
A.18个B.20个C.21个D.23个
A.5minB.10minC.12minD.15min
A.130+0-0.025mmB.130+0.005-0.02mmC.130+0.005-0.025mmD.130+0.005+0mm
A.230+0-0.013mmB.230+0-0.015mmC.230+0-0.02mmD.230+0-0.025mm