单项选择题
A.1/1000B.1/100C.1/500D.1/2000
A.30°B.60°C.90°D.120°
A.22B.21C.20D.19
A.108°B.111°C.114°D.117°
A.对称性B.唯一性C.有限性D.集中性
A.-1°30′B.0°C.1°30′D.3°
微信扫一扫,免费拍照搜题
微信扫一扫,免费拍照搜题