单项选择题
A.0.56 B.0.55 C.0.54 D.0.57
A.(2.85±0.14)*2 B.2.85±0.14 C.2.85 D.2.8
A.0.5-0.1 B.0.5+0.1 C.0.5 D.1
A.1.5 B.2 C.2.5 D.1
微信扫一扫,加关注免费搜题