单项选择题
A.20x20B.100x20C.50x10D.40x15
A.气压B.热压C.油压D.冷压
A.0.1~0.2B.0.2~0.3C.0.6~0.8D.0.9~1.2
A.10B.20C.30D.48
微信扫一扫,加关注免费搜题