单项选择题
A.7-10mm B.8-10mm C.7-11mm D.7-12mm
A.1/2 B.1/3 C.1/5 D.1/6
A.时.深.透.碎.平.实 B.松.碎.软.平 C.松.碎.软.平.透 D.时.深.透.碎.平